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perf(tracer): improve performance of DefaultContextProvider #14920

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Description

Two small tweaks to improve the overhead of DefaultContextProvider.

  • Replace isinstance(item, Span) with type(item) is Span`
    • Skip the isinstance check because we should only ever have this exact class and not a subclass
  • Remove calls to Span.finished which is a computed property

Testing

Risks

Additional Notes

@brettlangdon brettlangdon added the changelog/no-changelog A changelog entry is not required for this PR. label Oct 16, 2025
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CODEOWNERS have been resolved as:

ddtrace/_trace/provider.py                                              @DataDog/apm-sdk-capabilities-python

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Bootstrap import analysis

Comparison of import times between this PR and base.

Summary

The average import time from this PR is: 246 ± 4 ms.

The average import time from base is: 247 ± 5 ms.

The import time difference between this PR and base is: -1.6 ± 0.2 ms.

Import time breakdown

The following import paths have shrunk:

ddtrace.auto 1.967 ms (0.80%)
ddtrace.bootstrap.sitecustomize 1.292 ms (0.53%)
ddtrace.bootstrap.preload 1.292 ms (0.53%)
ddtrace.internal.remoteconfig.client 0.635 ms (0.26%)
ddtrace 0.675 ms (0.27%)
ddtrace.internal._unpatched 0.030 ms (0.01%)
json 0.030 ms (0.01%)
json.decoder 0.030 ms (0.01%)
re 0.030 ms (0.01%)
enum 0.030 ms (0.01%)
types 0.030 ms (0.01%)

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pr-commenter bot commented Oct 16, 2025

Performance SLOs

Comparing candidate APMLP-474/improve.provider (964e140) with baseline main (28fecf2)

📈 Performance Regressions (1 suite)
📈 telemetryaddmetric - 30/30

✅ 1-count-metric-1-times

Time: ✅ 3.445µs (SLO: <20.000µs 📉 -82.8%) vs baseline: +9.1%

Memory: ✅ 32.086MB (SLO: <34.000MB -5.6%) vs baseline: +4.6%

✅ 1-count-metrics-100-times

Time: ✅ 217.481µs (SLO: <250.000µs 📉 -13.0%) vs baseline: +0.8%

Memory: ✅ 32.106MB (SLO: <34.000MB -5.6%) vs baseline: +4.9%

✅ 1-distribution-metric-1-times

Time: ✅ 2.961µs (SLO: <20.000µs 📉 -85.2%) vs baseline: +0.9%

Memory: ✅ 32.145MB (SLO: <34.000MB -5.5%) vs baseline: +4.9%

✅ 1-distribution-metrics-100-times

Time: ✅ 196.316µs (SLO: <220.000µs 📉 -10.8%) vs baseline: +1.7%

Memory: ✅ 32.185MB (SLO: <34.000MB -5.3%) vs baseline: +5.1%

✅ 1-gauge-metric-1-times

Time: ✅ 2.318µs (SLO: <20.000µs 📉 -88.4%) vs baseline: 📈 +13.3%

Memory: ✅ 32.067MB (SLO: <34.000MB -5.7%) vs baseline: +4.7%

✅ 1-gauge-metrics-100-times

Time: ✅ 125.046µs (SLO: <150.000µs 📉 -16.6%) vs baseline: +0.8%

Memory: ✅ 32.086MB (SLO: <34.000MB -5.6%) vs baseline: +4.8%

✅ 1-rate-metric-1-times

Time: ✅ 3.443µs (SLO: <20.000µs 📉 -82.8%) vs baseline: +9.3%

Memory: ✅ 32.027MB (SLO: <34.000MB -5.8%) vs baseline: +4.5%

✅ 1-rate-metrics-100-times

Time: ✅ 214.859µs (SLO: <250.000µs 📉 -14.1%) vs baseline: -0.6%

Memory: ✅ 32.126MB (SLO: <34.000MB -5.5%) vs baseline: +4.7%

✅ 100-count-metrics-100-times

Time: ✅ 21.821ms (SLO: <23.500ms -7.1%) vs baseline: +1.9%

Memory: ✅ 32.106MB (SLO: <34.000MB -5.6%) vs baseline: +5.0%

✅ 100-distribution-metrics-100-times

Time: ✅ 1.990ms (SLO: <2.250ms 📉 -11.6%) vs baseline: +0.2%

Memory: ✅ 32.165MB (SLO: <34.000MB -5.4%) vs baseline: +5.0%

✅ 100-gauge-metrics-100-times

Time: ✅ 1.301ms (SLO: <1.550ms 📉 -16.0%) vs baseline: +1.1%

Memory: ✅ 32.165MB (SLO: <34.000MB -5.4%) vs baseline: +5.0%

✅ 100-rate-metrics-100-times

Time: ✅ 2.249ms (SLO: <2.550ms 📉 -11.8%) vs baseline: +2.4%

Memory: ✅ 32.145MB (SLO: <34.000MB -5.5%) vs baseline: +4.9%

✅ flush-1-metric

Time: ✅ 4.281µs (SLO: <20.000µs 📉 -78.6%) vs baseline: +0.6%

Memory: ✅ 32.145MB (SLO: <34.000MB -5.5%) vs baseline: +5.1%

✅ flush-100-metrics

Time: ✅ 181.614µs (SLO: <250.000µs 📉 -27.4%) vs baseline: ~same

Memory: ✅ 32.106MB (SLO: <34.000MB -5.6%) vs baseline: +5.1%

✅ flush-1000-metrics

Time: ✅ 2.225ms (SLO: <2.500ms 📉 -11.0%) vs baseline: -0.5%

Memory: ✅ 32.893MB (SLO: <34.500MB -4.7%) vs baseline: +4.8%

🟡 Near SLO Breach (5 suites)
🟡 djangosimple - 30/30

✅ appsec

Time: ✅ 20.439ms (SLO: <22.300ms -8.3%) vs baseline: ~same

Memory: ✅ 65.484MB (SLO: <67.000MB -2.3%) vs baseline: +5.0%

✅ exception-replay-enabled

Time: ✅ 1.345ms (SLO: <1.450ms -7.3%) vs baseline: -0.3%

Memory: ✅ 64.604MB (SLO: <67.000MB -3.6%) vs baseline: +4.8%

✅ iast

Time: ✅ 20.411ms (SLO: <22.250ms -8.3%) vs baseline: ~same

Memory: ✅ 65.486MB (SLO: <67.000MB -2.3%) vs baseline: +4.9%

✅ profiler

Time: ✅ 15.247ms (SLO: <16.550ms -7.9%) vs baseline: ~same

Memory: ✅ 53.654MB (SLO: <54.500MB 🟡 -1.6%) vs baseline: +4.4%

✅ resource-renaming

Time: ✅ 20.572ms (SLO: <21.750ms -5.4%) vs baseline: +0.3%

Memory: ✅ 65.484MB (SLO: <67.000MB -2.3%) vs baseline: +4.9%

✅ span-code-origin

Time: ✅ 26.142ms (SLO: <28.200ms -7.3%) vs baseline: -0.5%

Memory: ✅ 67.604MB (SLO: <69.500MB -2.7%) vs baseline: +4.9%

✅ tracer

Time: ✅ 20.402ms (SLO: <21.750ms -6.2%) vs baseline: -0.5%

Memory: ✅ 65.446MB (SLO: <67.000MB -2.3%) vs baseline: +4.9%

✅ tracer-and-profiler

Time: ✅ 22.032ms (SLO: <23.500ms -6.2%) vs baseline: -0.3%

Memory: ✅ 66.572MB (SLO: <67.500MB 🟡 -1.4%) vs baseline: +4.9%

✅ tracer-dont-create-db-spans

Time: ✅ 19.322ms (SLO: <21.500ms 📉 -10.1%) vs baseline: ~same

Memory: ✅ 65.480MB (SLO: <66.000MB 🟡 -0.8%) vs baseline: +4.9%

✅ tracer-minimal

Time: ✅ 16.593ms (SLO: <17.500ms -5.2%) vs baseline: ~same

Memory: ✅ 65.452MB (SLO: <66.000MB 🟡 -0.8%) vs baseline: +4.9%

✅ tracer-native

Time: ✅ 20.424ms (SLO: <21.750ms -6.1%) vs baseline: -0.6%

Memory: ✅ 71.397MB (SLO: <72.500MB 🟡 -1.5%) vs baseline: +4.9%

✅ tracer-no-caches

Time: ✅ 18.456ms (SLO: <19.650ms -6.1%) vs baseline: ~same

Memory: ✅ 65.466MB (SLO: <67.000MB -2.3%) vs baseline: +4.9%

✅ tracer-no-databases

Time: ✅ 18.763ms (SLO: <20.100ms -6.6%) vs baseline: +0.2%

Memory: ✅ 65.222MB (SLO: <67.000MB -2.7%) vs baseline: +4.5%

✅ tracer-no-middleware

Time: ✅ 20.121ms (SLO: <21.500ms -6.4%) vs baseline: -0.4%

Memory: ✅ 65.469MB (SLO: <67.000MB -2.3%) vs baseline: +4.9%

✅ tracer-no-templates

Time: ✅ 20.265ms (SLO: <22.000ms -7.9%) vs baseline: -0.2%

Memory: ✅ 65.407MB (SLO: <67.000MB -2.4%) vs baseline: +4.8%

🟡 errortrackingdjangosimple - 6/6

✅ errortracking-enabled-all

Time: ✅ 18.064ms (SLO: <19.850ms -9.0%) vs baseline: ~same

Memory: ✅ 65.313MB (SLO: <66.500MB 🟡 -1.8%) vs baseline: +5.0%

✅ errortracking-enabled-user

Time: ✅ 18.104ms (SLO: <19.400ms -6.7%) vs baseline: +0.2%

Memory: ✅ 65.176MB (SLO: <66.500MB 🟡 -2.0%) vs baseline: +4.8%

✅ tracer-enabled

Time: ✅ 18.036ms (SLO: <19.450ms -7.3%) vs baseline: -0.3%

Memory: ✅ 65.195MB (SLO: <66.500MB 🟡 -2.0%) vs baseline: +4.8%

🟡 flasksimple - 18/18

✅ appsec-get

Time: ✅ 4.543ms (SLO: <4.750ms -4.4%) vs baseline: -0.4%

Memory: ✅ 61.971MB (SLO: <65.000MB -4.7%) vs baseline: +4.9%

✅ appsec-post

Time: ✅ 6.564ms (SLO: <6.750ms -2.7%) vs baseline: -0.2%

Memory: ✅ 61.991MB (SLO: <65.000MB -4.6%) vs baseline: +4.7%

✅ appsec-telemetry

Time: ✅ 4.540ms (SLO: <4.750ms -4.4%) vs baseline: -0.8%

Memory: ✅ 62.010MB (SLO: <65.000MB -4.6%) vs baseline: +4.8%

✅ debugger

Time: ✅ 1.855ms (SLO: <2.000ms -7.2%) vs baseline: -0.4%

Memory: ✅ 45.436MB (SLO: <47.000MB -3.3%) vs baseline: +4.7%

✅ iast-get

Time: ✅ 1.859ms (SLO: <2.000ms -7.0%) vs baseline: +0.1%

Memory: ✅ 42.330MB (SLO: <49.000MB 📉 -13.6%) vs baseline: +4.8%

✅ profiler

Time: ✅ 1.907ms (SLO: <2.100ms -9.2%) vs baseline: -0.2%

Memory: ✅ 46.498MB (SLO: <47.000MB 🟡 -1.1%) vs baseline: +5.0%

✅ resource-renaming

Time: ✅ 3.369ms (SLO: <3.650ms -7.7%) vs baseline: -0.4%

Memory: ✅ 52.219MB (SLO: <53.500MB -2.4%) vs baseline: +4.9%

✅ tracer

Time: ✅ 3.351ms (SLO: <3.650ms -8.2%) vs baseline: ~same

Memory: ✅ 52.258MB (SLO: <53.500MB -2.3%) vs baseline: +4.8%

✅ tracer-native

Time: ✅ 3.354ms (SLO: <3.650ms -8.1%) vs baseline: -0.2%

Memory: ✅ 58.402MB (SLO: <60.000MB -2.7%) vs baseline: +5.1%

🟡 otelspan - 22/22

✅ add-event

Time: ✅ 41.082ms (SLO: <47.150ms 📉 -12.9%) vs baseline: +0.3%

Memory: ✅ 44.184MB (SLO: <47.000MB -6.0%) vs baseline: +5.0%

✅ add-metrics

Time: ✅ 319.844ms (SLO: <344.800ms -7.2%) vs baseline: +1.0%

Memory: ✅ 616.415MB (SLO: <630.000MB -2.2%) vs baseline: +4.8%

✅ add-tags

Time: ✅ 287.891ms (SLO: <314.000ms -8.3%) vs baseline: ~same

Memory: ✅ 618.729MB (SLO: <630.000MB 🟡 -1.8%) vs baseline: +4.9%

✅ get-context

Time: ✅ 81.036ms (SLO: <92.350ms 📉 -12.3%) vs baseline: +0.2%

Memory: ✅ 39.785MB (SLO: <46.500MB 📉 -14.4%) vs baseline: +5.0%

✅ is-recording

Time: ✅ 38.307ms (SLO: <44.500ms 📉 -13.9%) vs baseline: -0.5%

Memory: ✅ 43.551MB (SLO: <47.500MB -8.3%) vs baseline: +4.9%

✅ record-exception

Time: ✅ 58.469ms (SLO: <67.650ms 📉 -13.6%) vs baseline: +0.2%

Memory: ✅ 40.106MB (SLO: <47.000MB 📉 -14.7%) vs baseline: +4.8%

✅ set-status

Time: ✅ 44.198ms (SLO: <50.400ms 📉 -12.3%) vs baseline: ~same

Memory: ✅ 43.583MB (SLO: <47.000MB -7.3%) vs baseline: +4.8%

✅ start

Time: ✅ 37.701ms (SLO: <43.450ms 📉 -13.2%) vs baseline: +0.2%

Memory: ✅ 43.558MB (SLO: <47.000MB -7.3%) vs baseline: +5.0%

✅ start-finish

Time: ✅ 82.955ms (SLO: <88.000ms -5.7%) vs baseline: ~same

Memory: ✅ 34.603MB (SLO: <46.500MB 📉 -25.6%) vs baseline: +5.0%

✅ start-finish-telemetry

Time: ✅ 84.313ms (SLO: <89.000ms -5.3%) vs baseline: ~same

Memory: ✅ 34.564MB (SLO: <46.500MB 📉 -25.7%) vs baseline: +4.9%

✅ update-name

Time: ✅ 39.221ms (SLO: <45.150ms 📉 -13.1%) vs baseline: ~same

Memory: ✅ 43.967MB (SLO: <47.000MB -6.5%) vs baseline: +4.9%

🟡 span - 26/26

✅ add-event

Time: ✅ 20.993ms (SLO: <22.500ms -6.7%) vs baseline: +2.3%

Memory: ✅ 49.662MB (SLO: <53.000MB -6.3%) vs baseline: +4.7%

✅ add-metrics

Time: ✅ 90.845ms (SLO: <93.500ms -2.8%) vs baseline: +0.5%

Memory: ✅ 690.369MB (SLO: <961.000MB 📉 -28.2%) vs baseline: +4.9%

✅ add-tags

Time: ✅ 148.063ms (SLO: <155.000ms -4.5%) vs baseline: +0.4%

Memory: ✅ 690.212MB (SLO: <962.500MB 📉 -28.3%) vs baseline: +4.9%

✅ get-context

Time: ✅ 18.736ms (SLO: <20.500ms -8.6%) vs baseline: ~same

Memory: ✅ 48.403MB (SLO: <53.000MB -8.7%) vs baseline: +4.7%

✅ is-recording

Time: ✅ 19.608ms (SLO: <20.500ms -4.4%) vs baseline: +2.8%

Memory: ✅ 48.400MB (SLO: <53.000MB -8.7%) vs baseline: +4.7%

✅ record-exception

Time: ✅ 37.960ms (SLO: <40.000ms -5.1%) vs baseline: +1.2%

Memory: ✅ 42.477MB (SLO: <53.000MB 📉 -19.9%) vs baseline: +5.0%

✅ set-status

Time: ✅ 20.714ms (SLO: <22.000ms -5.8%) vs baseline: +0.4%

Memory: ✅ 48.442MB (SLO: <53.000MB -8.6%) vs baseline: +5.0%

✅ start

Time: ✅ 18.748ms (SLO: <20.500ms -8.5%) vs baseline: -0.3%

Memory: ✅ 48.426MB (SLO: <53.000MB -8.6%) vs baseline: +4.9%

✅ start-finish

Time: ✅ 51.672ms (SLO: <52.500ms 🟡 -1.6%) vs baseline: +1.0%

Memory: ✅ 32.126MB (SLO: <34.000MB -5.5%) vs baseline: +4.9%

✅ start-finish-telemetry

Time: ✅ 52.758ms (SLO: <54.500ms -3.2%) vs baseline: +0.4%

Memory: ✅ 32.126MB (SLO: <34.000MB -5.5%) vs baseline: +4.8%

✅ start-finish-traceid128

Time: ✅ 55.004ms (SLO: <56.000ms 🟡 -1.8%) vs baseline: +0.3%

Memory: ✅ 32.145MB (SLO: <34.000MB -5.5%) vs baseline: +5.1%

✅ start-traceid128

Time: ✅ 19.257ms (SLO: <22.500ms 📉 -14.4%) vs baseline: -0.3%

Memory: ✅ 48.364MB (SLO: <53.000MB -8.7%) vs baseline: +4.7%

✅ update-name

Time: ✅ 19.144ms (SLO: <22.000ms 📉 -13.0%) vs baseline: -0.3%

Memory: ✅ 49.055MB (SLO: <53.000MB -7.4%) vs baseline: +4.7%

⚠️ Unstable Tests (1 suite)
⚠️ coreapiscenario - 10/10 (1 unstable)

⚠️ context_with_data_listeners

Time: ⚠️ 13.220µs (SLO: <20.000µs 📉 -33.9%) vs baseline: -1.2%

Memory: ✅ 32.086MB (SLO: <33.500MB -4.2%) vs baseline: +4.7%

✅ context_with_data_no_listeners

Time: ✅ 3.293µs (SLO: <10.000µs 📉 -67.1%) vs baseline: +0.4%

Memory: ✅ 32.145MB (SLO: <33.500MB -4.0%) vs baseline: +4.9%

✅ get_item_exists

Time: ✅ 0.586µs (SLO: <10.000µs 📉 -94.1%) vs baseline: -0.5%

Memory: ✅ 32.126MB (SLO: <33.500MB -4.1%) vs baseline: +4.8%

✅ get_item_missing

Time: ✅ 0.642µs (SLO: <10.000µs 📉 -93.6%) vs baseline: -0.4%

Memory: ✅ 32.067MB (SLO: <33.500MB -4.3%) vs baseline: +4.6%

✅ set_item

Time: ✅ 24.240µs (SLO: <30.000µs 📉 -19.2%) vs baseline: +0.5%

Memory: ✅ 32.106MB (SLO: <33.500MB -4.2%) vs baseline: +4.8%

✅ All Tests Passing (17 suites)
✅ errortrackingflasksqli - 6/6

✅ errortracking-enabled-all

Time: ✅ 2.078ms (SLO: <2.300ms -9.7%) vs baseline: ~same

Memory: ✅ 52.199MB (SLO: <53.500MB -2.4%) vs baseline: +5.0%

✅ errortracking-enabled-user

Time: ✅ 2.065ms (SLO: <2.250ms -8.2%) vs baseline: -0.3%

Memory: ✅ 52.140MB (SLO: <53.500MB -2.5%) vs baseline: +4.9%

✅ tracer-enabled

Time: ✅ 2.067ms (SLO: <2.300ms 📉 -10.1%) vs baseline: -0.2%

Memory: ✅ 52.140MB (SLO: <53.500MB -2.5%) vs baseline: +4.9%

✅ flasksqli - 6/6

✅ appsec-enabled

Time: ✅ 3.907ms (SLO: <4.200ms -7.0%) vs baseline: +0.2%

Memory: ✅ 62.285MB (SLO: <66.000MB -5.6%) vs baseline: +4.9%

✅ iast-enabled

Time: ✅ 2.435ms (SLO: <2.800ms 📉 -13.0%) vs baseline: -0.3%

Memory: ✅ 58.687MB (SLO: <60.000MB -2.2%) vs baseline: +4.9%

✅ tracer-enabled

Time: ✅ 2.058ms (SLO: <2.250ms -8.6%) vs baseline: ~same

Memory: ✅ 52.140MB (SLO: <54.500MB -4.3%) vs baseline: +4.8%

✅ httppropagationextract - 60/60

✅ all_styles_all_headers

Time: ✅ 81.520µs (SLO: <100.000µs 📉 -18.5%) vs baseline: -0.4%

Memory: ✅ 32.185MB (SLO: <33.500MB -3.9%) vs baseline: +5.1%

✅ b3_headers

Time: ✅ 14.250µs (SLO: <20.000µs 📉 -28.8%) vs baseline: +1.0%

Memory: ✅ 32.145MB (SLO: <33.500MB -4.0%) vs baseline: +4.7%

✅ b3_single_headers

Time: ✅ 13.414µs (SLO: <20.000µs 📉 -32.9%) vs baseline: -0.5%

Memory: ✅ 32.126MB (SLO: <33.500MB -4.1%) vs baseline: +4.7%

✅ datadog_tracecontext_tracestate_not_propagated_on_trace_id_no_match

Time: ✅ 63.993µs (SLO: <80.000µs 📉 -20.0%) vs baseline: +0.3%

Memory: ✅ 32.204MB (SLO: <33.500MB -3.9%) vs baseline: +5.2%

✅ datadog_tracecontext_tracestate_propagated_on_trace_id_match

Time: ✅ 65.750µs (SLO: <80.000µs 📉 -17.8%) vs baseline: -0.3%

Memory: ✅ 32.165MB (SLO: <33.500MB -4.0%) vs baseline: +4.9%

✅ empty_headers

Time: ✅ 1.598µs (SLO: <10.000µs 📉 -84.0%) vs baseline: -0.6%

Memory: ✅ 32.224MB (SLO: <33.500MB -3.8%) vs baseline: +4.9%

✅ full_t_id_datadog_headers

Time: ✅ 23.067µs (SLO: <30.000µs 📉 -23.1%) vs baseline: +0.8%

Memory: ✅ 32.224MB (SLO: <33.500MB -3.8%) vs baseline: +5.1%

✅ invalid_priority_header

Time: ✅ 6.500µs (SLO: <10.000µs 📉 -35.0%) vs baseline: -0.4%

Memory: ✅ 32.204MB (SLO: <33.500MB -3.9%) vs baseline: +5.2%

✅ invalid_span_id_header

Time: ✅ 6.523µs (SLO: <10.000µs 📉 -34.8%) vs baseline: ~same

Memory: ✅ 32.106MB (SLO: <33.500MB -4.2%) vs baseline: +4.4%

✅ invalid_tags_header

Time: ✅ 6.543µs (SLO: <10.000µs 📉 -34.6%) vs baseline: +0.1%

Memory: ✅ 32.165MB (SLO: <33.500MB -4.0%) vs baseline: +4.9%

✅ invalid_trace_id_header

Time: ✅ 6.522µs (SLO: <10.000µs 📉 -34.8%) vs baseline: -0.1%

Memory: ✅ 32.204MB (SLO: <33.500MB -3.9%) vs baseline: +4.9%

✅ large_header_no_matches

Time: ✅ 27.528µs (SLO: <30.000µs -8.2%) vs baseline: ~same

Memory: ✅ 32.126MB (SLO: <33.500MB -4.1%) vs baseline: +4.5%

✅ large_valid_headers_all

Time: ✅ 28.648µs (SLO: <40.000µs 📉 -28.4%) vs baseline: +0.1%

Memory: ✅ 32.145MB (SLO: <33.500MB -4.0%) vs baseline: +4.9%

✅ medium_header_no_matches

Time: ✅ 9.801µs (SLO: <20.000µs 📉 -51.0%) vs baseline: -0.6%

Memory: ✅ 32.165MB (SLO: <33.500MB -4.0%) vs baseline: +4.9%

✅ medium_valid_headers_all

Time: ✅ 11.288µs (SLO: <20.000µs 📉 -43.6%) vs baseline: +0.9%

Memory: ✅ 32.185MB (SLO: <33.500MB -3.9%) vs baseline: +4.8%

✅ none_propagation_style

Time: ✅ 1.715µs (SLO: <10.000µs 📉 -82.9%) vs baseline: +0.2%

Memory: ✅ 32.185MB (SLO: <33.500MB -3.9%) vs baseline: +4.9%

✅ tracecontext_headers

Time: ✅ 34.554µs (SLO: <40.000µs 📉 -13.6%) vs baseline: +1.0%

Memory: ✅ 32.185MB (SLO: <33.500MB -3.9%) vs baseline: +4.9%

✅ valid_headers_all

Time: ✅ 6.519µs (SLO: <10.000µs 📉 -34.8%) vs baseline: +0.2%

Memory: ✅ 32.165MB (SLO: <33.500MB -4.0%) vs baseline: +4.9%

✅ valid_headers_basic

Time: ✅ 6.093µs (SLO: <10.000µs 📉 -39.1%) vs baseline: ~same

Memory: ✅ 32.224MB (SLO: <33.500MB -3.8%) vs baseline: +4.9%

✅ wsgi_empty_headers

Time: ✅ 1.592µs (SLO: <10.000µs 📉 -84.1%) vs baseline: -1.5%

Memory: ✅ 32.165MB (SLO: <33.500MB -4.0%) vs baseline: +4.7%

✅ wsgi_invalid_priority_header

Time: ✅ 6.570µs (SLO: <10.000µs 📉 -34.3%) vs baseline: ~same

Memory: ✅ 32.165MB (SLO: <33.500MB -4.0%) vs baseline: +4.8%

✅ wsgi_invalid_span_id_header

Time: ✅ 1.586µs (SLO: <10.000µs 📉 -84.1%) vs baseline: -0.9%

Memory: ✅ 32.204MB (SLO: <33.500MB -3.9%) vs baseline: +5.0%

✅ wsgi_invalid_tags_header

Time: ✅ 6.577µs (SLO: <10.000µs 📉 -34.2%) vs baseline: ~same

Memory: ✅ 32.224MB (SLO: <33.500MB -3.8%) vs baseline: +5.0%

✅ wsgi_invalid_trace_id_header

Time: ✅ 6.716µs (SLO: <10.000µs 📉 -32.8%) vs baseline: +1.7%

Memory: ✅ 32.224MB (SLO: <33.500MB -3.8%) vs baseline: +4.9%

✅ wsgi_large_header_no_matches

Time: ✅ 28.693µs (SLO: <40.000µs 📉 -28.3%) vs baseline: +0.3%

Memory: ✅ 32.165MB (SLO: <33.500MB -4.0%) vs baseline: +4.8%

✅ wsgi_large_valid_headers_all

Time: ✅ 29.857µs (SLO: <40.000µs 📉 -25.4%) vs baseline: +0.3%

Memory: ✅ 32.145MB (SLO: <33.500MB -4.0%) vs baseline: +4.9%

✅ wsgi_medium_header_no_matches

Time: ✅ 10.058µs (SLO: <20.000µs 📉 -49.7%) vs baseline: -0.4%

Memory: ✅ 32.145MB (SLO: <33.500MB -4.0%) vs baseline: +4.9%

✅ wsgi_medium_valid_headers_all

Time: ✅ 11.554µs (SLO: <20.000µs 📉 -42.2%) vs baseline: +0.8%

Memory: ✅ 32.224MB (SLO: <33.500MB -3.8%) vs baseline: +5.0%

✅ wsgi_valid_headers_all

Time: ✅ 6.553µs (SLO: <10.000µs 📉 -34.5%) vs baseline: -0.7%

Memory: ✅ 32.047MB (SLO: <33.500MB -4.3%) vs baseline: +4.4%

✅ wsgi_valid_headers_basic

Time: ✅ 6.134µs (SLO: <10.000µs 📉 -38.7%) vs baseline: +0.5%

Memory: ✅ 32.145MB (SLO: <33.500MB -4.0%) vs baseline: +4.9%

✅ httppropagationinject - 16/16

✅ ids_only

Time: ✅ 21.757µs (SLO: <30.000µs 📉 -27.5%) vs baseline: +0.8%

Memory: ✅ 32.224MB (SLO: <33.500MB -3.8%) vs baseline: +4.9%

✅ with_all

Time: ✅ 28.783µs (SLO: <40.000µs 📉 -28.0%) vs baseline: +0.3%

Memory: ✅ 32.185MB (SLO: <33.500MB -3.9%) vs baseline: +5.0%

✅ with_dd_origin

Time: ✅ 25.471µs (SLO: <30.000µs 📉 -15.1%) vs baseline: +0.3%

Memory: ✅ 32.126MB (SLO: <33.500MB -4.1%) vs baseline: +4.9%

✅ with_priority_and_origin

Time: ✅ 24.824µs (SLO: <40.000µs 📉 -37.9%) vs baseline: +0.4%

Memory: ✅ 32.165MB (SLO: <33.500MB -4.0%) vs baseline: +4.9%

✅ with_sampling_priority

Time: ✅ 21.659µs (SLO: <30.000µs 📉 -27.8%) vs baseline: +0.6%

Memory: ✅ 32.086MB (SLO: <33.500MB -4.2%) vs baseline: +4.5%

✅ with_tags

Time: ✅ 27.032µs (SLO: <40.000µs 📉 -32.4%) vs baseline: +0.8%

Memory: ✅ 32.204MB (SLO: <33.500MB -3.9%) vs baseline: +5.0%

✅ with_tags_invalid

Time: ✅ 28.635µs (SLO: <40.000µs 📉 -28.4%) vs baseline: +1.3%

Memory: ✅ 32.106MB (SLO: <33.500MB -4.2%) vs baseline: +4.7%

✅ with_tags_max_size

Time: ✅ 27.383µs (SLO: <40.000µs 📉 -31.5%) vs baseline: +0.9%

Memory: ✅ 32.185MB (SLO: <33.500MB -3.9%) vs baseline: +4.9%

✅ iast_aspects - 40/40

✅ re_expand_aspect

Time: ✅ 32.383µs (SLO: <40.000µs 📉 -19.0%) vs baseline: +1.0%

Memory: ✅ 37.670MB (SLO: <39.000MB -3.4%) vs baseline: +4.9%

✅ re_expand_noaspect

Time: ✅ 28.564µs (SLO: <40.000µs 📉 -28.6%) vs baseline: -0.3%

Memory: ✅ 37.650MB (SLO: <39.000MB -3.5%) vs baseline: +4.7%

✅ re_findall_aspect

Time: ✅ 2.920µs (SLO: <10.000µs 📉 -70.8%) vs baseline: +1.7%

Memory: ✅ 37.690MB (SLO: <39.000MB -3.4%) vs baseline: +4.9%

✅ re_findall_noaspect

Time: ✅ 1.416µs (SLO: <10.000µs 📉 -85.8%) vs baseline: -0.4%

Memory: ✅ 37.690MB (SLO: <39.000MB -3.4%) vs baseline: +4.9%

✅ re_finditer_aspect

Time: ✅ 4.481µs (SLO: <10.000µs 📉 -55.2%) vs baseline: ~same

Memory: ✅ 37.670MB (SLO: <39.000MB -3.4%) vs baseline: +4.9%

✅ re_finditer_noaspect

Time: ✅ 1.399µs (SLO: <10.000µs 📉 -86.0%) vs baseline: -0.6%

Memory: ✅ 37.611MB (SLO: <39.000MB -3.6%) vs baseline: +4.5%

✅ re_fullmatch_aspect

Time: ✅ 2.698µs (SLO: <10.000µs 📉 -73.0%) vs baseline: +0.5%

Memory: ✅ 37.709MB (SLO: <39.000MB -3.3%) vs baseline: +5.1%

✅ re_fullmatch_noaspect

Time: ✅ 1.288µs (SLO: <10.000µs 📉 -87.1%) vs baseline: -0.5%

Memory: ✅ 37.591MB (SLO: <39.000MB -3.6%) vs baseline: +4.5%

✅ re_group_aspect

Time: ✅ 3.088µs (SLO: <10.000µs 📉 -69.1%) vs baseline: +4.5%

Memory: ✅ 37.670MB (SLO: <39.000MB -3.4%) vs baseline: +4.9%

✅ re_group_noaspect

Time: ✅ 1.616µs (SLO: <10.000µs 📉 -83.8%) vs baseline: +0.8%

Memory: ✅ 37.611MB (SLO: <39.000MB -3.6%) vs baseline: +4.5%

✅ re_groups_aspect

Time: ✅ 3.194µs (SLO: <10.000µs 📉 -68.1%) vs baseline: +3.3%

Memory: ✅ 37.650MB (SLO: <39.000MB -3.5%) vs baseline: +4.8%

✅ re_groups_noaspect

Time: ✅ 1.711µs (SLO: <10.000µs 📉 -82.9%) vs baseline: +0.9%

Memory: ✅ 37.690MB (SLO: <39.000MB -3.4%) vs baseline: +4.9%

✅ re_match_aspect

Time: ✅ 2.870µs (SLO: <10.000µs 📉 -71.3%) vs baseline: +5.1%

Memory: ✅ 37.670MB (SLO: <39.000MB -3.4%) vs baseline: +4.9%

✅ re_match_noaspect

Time: ✅ 1.301µs (SLO: <10.000µs 📉 -87.0%) vs baseline: +0.6%

Memory: ✅ 37.709MB (SLO: <39.000MB -3.3%) vs baseline: +5.0%

✅ re_search_aspect

Time: ✅ 2.567µs (SLO: <10.000µs 📉 -74.3%) vs baseline: +0.7%

Memory: ✅ 37.631MB (SLO: <39.000MB -3.5%) vs baseline: +4.9%

✅ re_search_noaspect

Time: ✅ 1.196µs (SLO: <10.000µs 📉 -88.0%) vs baseline: -0.6%

Memory: ✅ 37.690MB (SLO: <39.000MB -3.4%) vs baseline: +4.9%

✅ re_sub_aspect

Time: ✅ 3.431µs (SLO: <10.000µs 📉 -65.7%) vs baseline: +0.5%

Memory: ✅ 37.631MB (SLO: <39.000MB -3.5%) vs baseline: +4.9%

✅ re_sub_noaspect

Time: ✅ 1.546µs (SLO: <10.000µs 📉 -84.5%) vs baseline: +2.1%

Memory: ✅ 37.690MB (SLO: <39.000MB -3.4%) vs baseline: +4.9%

✅ re_subn_aspect

Time: ✅ 3.622µs (SLO: <10.000µs 📉 -63.8%) vs baseline: -0.6%

Memory: ✅ 37.670MB (SLO: <39.000MB -3.4%) vs baseline: +4.7%

✅ re_subn_noaspect

Time: ✅ 1.612µs (SLO: <10.000µs 📉 -83.9%) vs baseline: +0.5%

Memory: ✅ 37.631MB (SLO: <39.000MB -3.5%) vs baseline: +4.6%

✅ iastaspects - 118/118

✅ add_aspect

Time: ✅ 0.405µs (SLO: <10.000µs 📉 -95.9%) vs baseline: +1.7%

Memory: ✅ 38.004MB (SLO: <39.000MB -2.6%) vs baseline: +4.7%

✅ add_inplace_aspect

Time: ✅ 0.411µs (SLO: <10.000µs 📉 -95.9%) vs baseline: +1.3%

Memory: ✅ 37.827MB (SLO: <39.000MB -3.0%) vs baseline: +4.2%

✅ add_inplace_noaspect

Time: ✅ 0.320µs (SLO: <10.000µs 📉 -96.8%) vs baseline: ~same

Memory: ✅ 38.044MB (SLO: <39.000MB -2.5%) vs baseline: +4.7%

✅ add_noaspect

Time: ✅ 0.279µs (SLO: <10.000µs 📉 -97.2%) vs baseline: +0.3%

Memory: ✅ 38.044MB (SLO: <39.000MB -2.5%) vs baseline: +4.9%

✅ bytearray_aspect

Time: ✅ 1.328µs (SLO: <10.000µs 📉 -86.7%) vs baseline: -0.4%

Memory: ✅ 38.103MB (SLO: <39.000MB -2.3%) vs baseline: +5.0%

✅ bytearray_extend_aspect

Time: ✅ 1.463µs (SLO: <10.000µs 📉 -85.4%) vs baseline: -0.2%

Memory: ✅ 38.103MB (SLO: <39.000MB -2.3%) vs baseline: +5.0%

✅ bytearray_extend_noaspect

Time: ✅ 0.609µs (SLO: <10.000µs 📉 -93.9%) vs baseline: -1.3%

Memory: ✅ 38.004MB (SLO: <39.000MB -2.6%) vs baseline: +4.6%

✅ bytearray_noaspect

Time: ✅ 0.485µs (SLO: <10.000µs 📉 -95.2%) vs baseline: -0.1%

Memory: ✅ 38.103MB (SLO: <39.000MB -2.3%) vs baseline: +4.8%

✅ bytes_aspect

Time: ✅ 1.297µs (SLO: <10.000µs 📉 -87.0%) vs baseline: +0.5%

Memory: ✅ 38.044MB (SLO: <39.000MB -2.5%) vs baseline: +4.9%

✅ bytes_noaspect

Time: ✅ 0.492µs (SLO: <10.000µs 📉 -95.1%) vs baseline: -0.1%

Memory: ✅ 38.103MB (SLO: <39.000MB -2.3%) vs baseline: +4.9%

✅ bytesio_aspect

Time: ✅ 1.380µs (SLO: <10.000µs 📉 -86.2%) vs baseline: +1.6%

Memory: ✅ 38.122MB (SLO: <39.000MB -2.3%) vs baseline: +4.9%

✅ bytesio_noaspect

Time: ✅ 0.503µs (SLO: <10.000µs 📉 -95.0%) vs baseline: +0.8%

Memory: ✅ 38.063MB (SLO: <39.000MB -2.4%) vs baseline: +5.1%

✅ capitalize_aspect

Time: ✅ 0.734µs (SLO: <10.000µs 📉 -92.7%) vs baseline: -0.3%

Memory: ✅ 38.044MB (SLO: <39.000MB -2.5%) vs baseline: +4.9%

✅ capitalize_noaspect

Time: ✅ 0.438µs (SLO: <10.000µs 📉 -95.6%) vs baseline: +0.2%

Memory: ✅ 38.122MB (SLO: <39.000MB -2.3%) vs baseline: +4.9%

✅ casefold_aspect

Time: ✅ 0.738µs (SLO: <10.000µs 📉 -92.6%) vs baseline: ~same

Memory: ✅ 38.103MB (SLO: <39.000MB -2.3%) vs baseline: +5.0%

✅ casefold_noaspect

Time: ✅ 0.368µs (SLO: <10.000µs 📉 -96.3%) vs baseline: +0.8%

Memory: ✅ 38.044MB (SLO: <39.000MB -2.5%) vs baseline: +4.9%

✅ decode_aspect

Time: ✅ 0.729µs (SLO: <10.000µs 📉 -92.7%) vs baseline: ~same

Memory: ✅ 38.083MB (SLO: <39.000MB -2.4%) vs baseline: +4.9%

✅ decode_noaspect

Time: ✅ 0.425µs (SLO: <10.000µs 📉 -95.8%) vs baseline: +1.3%

Memory: ✅ 38.103MB (SLO: <39.000MB -2.3%) vs baseline: +5.0%

✅ encode_aspect

Time: ✅ 0.716µs (SLO: <10.000µs 📉 -92.8%) vs baseline: +0.7%

Memory: ✅ 38.004MB (SLO: <39.000MB -2.6%) vs baseline: +4.6%

✅ encode_noaspect

Time: ✅ 0.405µs (SLO: <10.000µs 📉 -95.9%) vs baseline: +0.8%

Memory: ✅ 38.083MB (SLO: <39.000MB -2.4%) vs baseline: +4.9%

✅ format_aspect

Time: ✅ 3.393µs (SLO: <10.000µs 📉 -66.1%) vs baseline: +0.3%

Memory: ✅ 38.063MB (SLO: <39.000MB -2.4%) vs baseline: +5.0%

✅ format_map_aspect

Time: ✅ 3.642µs (SLO: <10.000µs 📉 -63.6%) vs baseline: +0.1%

Memory: ✅ 37.847MB (SLO: <39.000MB -3.0%) vs baseline: +4.1%

✅ format_map_noaspect

Time: ✅ 0.780µs (SLO: <10.000µs 📉 -92.2%) vs baseline: +0.2%

Memory: ✅ 38.024MB (SLO: <39.000MB -2.5%) vs baseline: +4.7%

✅ format_noaspect

Time: ✅ 0.596µs (SLO: <10.000µs 📉 -94.0%) vs baseline: ~same

Memory: ✅ 38.044MB (SLO: <39.000MB -2.5%) vs baseline: +4.9%

✅ index_aspect

Time: ✅ 0.358µs (SLO: <10.000µs 📉 -96.4%) vs baseline: -0.5%

Memory: ✅ 37.965MB (SLO: <39.000MB -2.7%) vs baseline: +4.5%

✅ index_noaspect

Time: ✅ 0.276µs (SLO: <10.000µs 📉 -97.2%) vs baseline: -1.0%

Memory: ✅ 38.004MB (SLO: <39.000MB -2.6%) vs baseline: +4.7%

✅ join_aspect

Time: ✅ 1.392µs (SLO: <10.000µs 📉 -86.1%) vs baseline: -0.9%

Memory: ✅ 38.004MB (SLO: <39.000MB -2.6%) vs baseline: +4.7%

✅ join_noaspect

Time: ✅ 0.494µs (SLO: <10.000µs 📉 -95.1%) vs baseline: +0.4%

Memory: ✅ 38.103MB (SLO: <39.000MB -2.3%) vs baseline: +5.1%

✅ ljust_aspect

Time: ✅ 2.488µs (SLO: <20.000µs 📉 -87.6%) vs baseline: +0.8%

Memory: ✅ 38.083MB (SLO: <39.000MB -2.4%) vs baseline: +4.9%

✅ ljust_noaspect

Time: ✅ 0.408µs (SLO: <10.000µs 📉 -95.9%) vs baseline: -0.7%

Memory: ✅ 38.044MB (SLO: <39.000MB -2.5%) vs baseline: +4.7%

✅ lower_aspect

Time: ✅ 2.223µs (SLO: <10.000µs 📉 -77.8%) vs baseline: +0.1%

Memory: ✅ 38.063MB (SLO: <39.000MB -2.4%) vs baseline: +4.8%

✅ lower_noaspect

Time: ✅ 0.371µs (SLO: <10.000µs 📉 -96.3%) vs baseline: -0.2%

Memory: ✅ 38.024MB (SLO: <39.000MB -2.5%) vs baseline: +4.7%

✅ lstrip_aspect

Time: ✅ 2.249µs (SLO: <20.000µs 📉 -88.8%) vs baseline: -0.2%

Memory: ✅ 38.103MB (SLO: <39.000MB -2.3%) vs baseline: +5.0%

✅ lstrip_noaspect

Time: ✅ 0.382µs (SLO: <10.000µs 📉 -96.2%) vs baseline: -0.6%

Memory: ✅ 38.083MB (SLO: <39.000MB -2.4%) vs baseline: +5.0%

✅ modulo_aspect

Time: ✅ 0.991µs (SLO: <10.000µs 📉 -90.1%) vs baseline: -1.1%

Memory: ✅ 38.063MB (SLO: <39.000MB -2.4%) vs baseline: +4.8%

✅ modulo_aspect_for_bytearray_bytearray

Time: ✅ 1.533µs (SLO: <10.000µs 📉 -84.7%) vs baseline: -0.5%

Memory: ✅ 38.024MB (SLO: <39.000MB -2.5%) vs baseline: +4.7%

✅ modulo_aspect_for_bytes

Time: ✅ 0.975µs (SLO: <10.000µs 📉 -90.2%) vs baseline: -0.7%

Memory: ✅ 38.083MB (SLO: <39.000MB -2.4%) vs baseline: +4.8%

✅ modulo_aspect_for_bytes_bytearray

Time: ✅ 1.213µs (SLO: <10.000µs 📉 -87.9%) vs baseline: +0.8%

Memory: ✅ 38.004MB (SLO: <39.000MB -2.6%) vs baseline: +4.6%

✅ modulo_noaspect

Time: ✅ 0.626µs (SLO: <10.000µs 📉 -93.7%) vs baseline: -0.5%

Memory: ✅ 38.044MB (SLO: <39.000MB -2.5%) vs baseline: +4.9%

✅ replace_aspect

Time: ✅ 4.840µs (SLO: <10.000µs 📉 -51.6%) vs baseline: +0.4%

Memory: ✅ 38.063MB (SLO: <39.000MB -2.4%) vs baseline: +4.8%

✅ replace_noaspect

Time: ✅ 0.458µs (SLO: <10.000µs 📉 -95.4%) vs baseline: -1.5%

Memory: ✅ 38.004MB (SLO: <39.000MB -2.6%) vs baseline: +4.8%

✅ repr_aspect

Time: ✅ 0.911µs (SLO: <10.000µs 📉 -90.9%) vs baseline: +0.3%

Memory: ✅ 38.103MB (SLO: <39.000MB -2.3%) vs baseline: +5.0%

✅ repr_noaspect

Time: ✅ 0.412µs (SLO: <10.000µs 📉 -95.9%) vs baseline: -1.0%

Memory: ✅ 38.063MB (SLO: <39.000MB -2.4%) vs baseline: +4.7%

✅ rstrip_aspect

Time: ✅ 1.931µs (SLO: <20.000µs 📉 -90.3%) vs baseline: -0.4%

Memory: ✅ 37.985MB (SLO: <39.000MB -2.6%) vs baseline: +4.9%

✅ rstrip_noaspect

Time: ✅ 0.382µs (SLO: <10.000µs 📉 -96.2%) vs baseline: +0.7%

Memory: ✅ 38.083MB (SLO: <39.000MB -2.4%) vs baseline: +4.9%

✅ slice_aspect

Time: ✅ 0.494µs (SLO: <10.000µs 📉 -95.1%) vs baseline: +0.2%

Memory: ✅ 38.044MB (SLO: <39.000MB -2.5%) vs baseline: +4.7%

✅ slice_noaspect

Time: ✅ 0.444µs (SLO: <10.000µs 📉 -95.6%) vs baseline: -1.3%

Memory: ✅ 38.004MB (SLO: <39.000MB -2.6%) vs baseline: +4.6%

✅ stringio_aspect

Time: ✅ 1.532µs (SLO: <10.000µs 📉 -84.7%) vs baseline: -0.2%

Memory: ✅ 38.083MB (SLO: <39.000MB -2.4%) vs baseline: +4.9%

✅ stringio_noaspect

Time: ✅ 0.714µs (SLO: <10.000µs 📉 -92.9%) vs baseline: +0.3%

Memory: ✅ 38.103MB (SLO: <39.000MB -2.3%) vs baseline: +5.0%

✅ strip_aspect

Time: ✅ 2.239µs (SLO: <20.000µs 📉 -88.8%) vs baseline: +0.4%

Memory: ✅ 38.024MB (SLO: <39.000MB -2.5%) vs baseline: +4.7%

✅ strip_noaspect

Time: ✅ 0.385µs (SLO: <10.000µs 📉 -96.1%) vs baseline: +0.7%

Memory: ✅ 38.063MB (SLO: <39.000MB -2.4%) vs baseline: +5.0%

✅ swapcase_aspect

Time: ✅ 2.446µs (SLO: <10.000µs 📉 -75.5%) vs baseline: ~same

Memory: ✅ 38.083MB (SLO: <39.000MB -2.4%) vs baseline: +4.9%

✅ swapcase_noaspect

Time: ✅ 0.533µs (SLO: <10.000µs 📉 -94.7%) vs baseline: -0.3%

Memory: ✅ 38.103MB (SLO: <39.000MB -2.3%) vs baseline: +5.0%

✅ title_aspect

Time: ✅ 2.364µs (SLO: <10.000µs 📉 -76.4%) vs baseline: ~same

Memory: ✅ 38.083MB (SLO: <39.000MB -2.4%) vs baseline: +5.1%

✅ title_noaspect

Time: ✅ 0.503µs (SLO: <10.000µs 📉 -95.0%) vs baseline: -0.3%

Memory: ✅ 38.044MB (SLO: <39.000MB -2.5%) vs baseline: +5.0%

✅ translate_aspect

Time: ✅ 3.219µs (SLO: <10.000µs 📉 -67.8%) vs baseline: -0.1%

Memory: ✅ 38.103MB (SLO: <39.000MB -2.3%) vs baseline: +5.0%

✅ translate_noaspect

Time: ✅ 1.039µs (SLO: <10.000µs 📉 -89.6%) vs baseline: ~same

Memory: ✅ 38.103MB (SLO: <39.000MB -2.3%) vs baseline: +5.0%

✅ upper_aspect

Time: ✅ 2.209µs (SLO: <10.000µs 📉 -77.9%) vs baseline: -2.0%

Memory: ✅ 38.103MB (SLO: <39.000MB -2.3%) vs baseline: +5.0%

✅ upper_noaspect

Time: ✅ 0.374µs (SLO: <10.000µs 📉 -96.3%) vs baseline: +0.7%

Memory: ✅ 38.063MB (SLO: <39.000MB -2.4%) vs baseline: +5.0%

✅ iastaspectsospath - 24/24

✅ ospathbasename_aspect

Time: ✅ 4.356µs (SLO: <10.000µs 📉 -56.4%) vs baseline: +1.0%

Memory: ✅ 37.631MB (SLO: <39.000MB -3.5%) vs baseline: +4.9%

✅ ospathbasename_noaspect

Time: ✅ 1.093µs (SLO: <10.000µs 📉 -89.1%) vs baseline: ~same

Memory: ✅ 37.690MB (SLO: <39.000MB -3.4%) vs baseline: +4.9%

✅ ospathjoin_aspect

Time: ✅ 6.188µs (SLO: <10.000µs 📉 -38.1%) vs baseline: +0.2%

Memory: ✅ 37.709MB (SLO: <39.000MB -3.3%) vs baseline: +5.0%

✅ ospathjoin_noaspect

Time: ✅ 2.309µs (SLO: <10.000µs 📉 -76.9%) vs baseline: ~same

Memory: ✅ 37.709MB (SLO: <39.000MB -3.3%) vs baseline: +5.1%

✅ ospathnormcase_aspect

Time: ✅ 3.519µs (SLO: <10.000µs 📉 -64.8%) vs baseline: +1.2%

Memory: ✅ 37.709MB (SLO: <39.000MB -3.3%) vs baseline: +4.9%

✅ ospathnormcase_noaspect

Time: ✅ 0.576µs (SLO: <10.000µs 📉 -94.2%) vs baseline: +1.0%

Memory: ✅ 37.591MB (SLO: <39.000MB -3.6%) vs baseline: +4.7%

✅ ospathsplit_aspect

Time: ✅ 5.041µs (SLO: <10.000µs 📉 -49.6%) vs baseline: +3.1%

Memory: ✅ 37.709MB (SLO: <39.000MB -3.3%) vs baseline: +5.0%

✅ ospathsplit_noaspect

Time: ✅ 1.614µs (SLO: <10.000µs 📉 -83.9%) vs baseline: +0.8%

Memory: ✅ 37.709MB (SLO: <39.000MB -3.3%) vs baseline: +5.1%

✅ ospathsplitdrive_aspect

Time: ✅ 3.656µs (SLO: <10.000µs 📉 -63.4%) vs baseline: -0.6%

Memory: ✅ 37.670MB (SLO: <39.000MB -3.4%) vs baseline: +5.0%

✅ ospathsplitdrive_noaspect

Time: ✅ 0.714µs (SLO: <10.000µs 📉 -92.9%) vs baseline: +1.6%

Memory: ✅ 37.690MB (SLO: <39.000MB -3.4%) vs baseline: +5.0%

✅ ospathsplitext_aspect

Time: ✅ 4.551µs (SLO: <10.000µs 📉 -54.5%) vs baseline: -0.8%

Memory: ✅ 37.670MB (SLO: <39.000MB -3.4%) vs baseline: +4.8%

✅ ospathsplitext_noaspect

Time: ✅ 1.396µs (SLO: <10.000µs 📉 -86.0%) vs baseline: -0.1%

Memory: ✅ 37.670MB (SLO: <39.000MB -3.4%) vs baseline: +4.9%

✅ iastaspectssplit - 12/12

✅ rsplit_aspect

Time: ✅ 1.433µs (SLO: <10.000µs 📉 -85.7%) vs baseline: -1.4%

Memory: ✅ 37.631MB (SLO: <39.000MB -3.5%) vs baseline: +4.7%

✅ rsplit_noaspect

Time: ✅ 0.587µs (SLO: <10.000µs 📉 -94.1%) vs baseline: +1.0%

Memory: ✅ 37.611MB (SLO: <39.000MB -3.6%) vs baseline: +4.7%

✅ split_aspect

Time: ✅ 1.439µs (SLO: <10.000µs 📉 -85.6%) vs baseline: +0.5%

Memory: ✅ 37.690MB (SLO: <39.000MB -3.4%) vs baseline: +5.1%

✅ split_noaspect

Time: ✅ 0.570µs (SLO: <10.000µs 📉 -94.3%) vs baseline: ~same

Memory: ✅ 37.670MB (SLO: <39.000MB -3.4%) vs baseline: +4.9%

✅ splitlines_aspect

Time: ✅ 1.397µs (SLO: <10.000µs 📉 -86.0%) vs baseline: -1.3%

Memory: ✅ 37.709MB (SLO: <39.000MB -3.3%) vs baseline: +4.7%

✅ splitlines_noaspect

Time: ✅ 0.590µs (SLO: <10.000µs 📉 -94.1%) vs baseline: +1.6%

Memory: ✅ 37.650MB (SLO: <39.000MB -3.5%) vs baseline: +4.8%

✅ iastpropagation - 2/2

✅ no-propagation

Time: ✅ 49.191µs (SLO: <60.000µs 📉 -18.0%) vs baseline: -0.1%

Memory: ✅ 37.690MB (SLO: <39.000MB -3.4%) vs baseline: +4.7%

✅ otelsdkspan - 24/24

✅ add-event

Time: ✅ 40.351ms (SLO: <42.000ms -3.9%) vs baseline: -0.3%

Memory: ✅ 34.485MB (SLO: <39.000MB 📉 -11.6%) vs baseline: +4.7%

✅ add-link

Time: ✅ 36.454ms (SLO: <38.550ms -5.4%) vs baseline: +0.1%

Memory: ✅ 34.564MB (SLO: <39.000MB 📉 -11.4%) vs baseline: +5.0%

✅ add-metrics

Time: ✅ 220.164ms (SLO: <232.000ms -5.1%) vs baseline: +0.6%

Memory: ✅ 34.524MB (SLO: <39.000MB 📉 -11.5%) vs baseline: +4.9%

✅ add-tags

Time: ✅ 211.713ms (SLO: <221.600ms -4.5%) vs baseline: ~same

Memory: ✅ 34.505MB (SLO: <39.000MB 📉 -11.5%) vs baseline: +4.7%

✅ get-context

Time: ✅ 29.280ms (SLO: <31.300ms -6.5%) vs baseline: +1.0%

Memory: ✅ 34.505MB (SLO: <39.000MB 📉 -11.5%) vs baseline: +4.7%

✅ is-recording

Time: ✅ 29.416ms (SLO: <31.000ms -5.1%) vs baseline: +0.5%

Memory: ✅ 34.465MB (SLO: <39.000MB 📉 -11.6%) vs baseline: +4.6%

✅ record-exception

Time: ✅ 63.162ms (SLO: <65.850ms -4.1%) vs baseline: -0.1%

Memory: ✅ 34.898MB (SLO: <39.000MB 📉 -10.5%) vs baseline: +4.8%

✅ set-status

Time: ✅ 32.243ms (SLO: <34.150ms -5.6%) vs baseline: +0.4%

Memory: ✅ 34.524MB (SLO: <39.000MB 📉 -11.5%) vs baseline: +4.9%

✅ start

Time: ✅ 28.816ms (SLO: <30.150ms -4.4%) vs baseline: -0.5%

Memory: ✅ 34.505MB (SLO: <39.000MB 📉 -11.5%) vs baseline: +4.7%

✅ start-finish

Time: ✅ 33.782ms (SLO: <35.350ms -4.4%) vs baseline: -0.7%

Memory: ✅ 34.524MB (SLO: <39.000MB 📉 -11.5%) vs baseline: +4.7%

✅ start-finish-telemetry

Time: ✅ 34.077ms (SLO: <35.450ms -3.9%) vs baseline: +0.4%

Memory: ✅ 34.524MB (SLO: <39.000MB 📉 -11.5%) vs baseline: +4.7%

✅ update-name

Time: ✅ 31.250ms (SLO: <33.400ms -6.4%) vs baseline: ~same

Memory: ✅ 34.524MB (SLO: <39.000MB 📉 -11.5%) vs baseline: +4.9%

✅ packagespackageforrootmodulemapping - 4/4

✅ cache_off

Time: ✅ 341.922ms (SLO: <354.300ms -3.5%) vs baseline: ~same

Memory: ✅ 38.020MB (SLO: <40.000MB -4.9%) vs baseline: +5.8%

✅ cache_on

Time: ✅ 0.383µs (SLO: <10.000µs 📉 -96.2%) vs baseline: ~same

Memory: ✅ 35.963MB (SLO: <39.000MB -7.8%) vs baseline: +4.6%

✅ packagesupdateimporteddependencies - 24/24

✅ import_many

Time: ✅ 154.610µs (SLO: <170.000µs -9.1%) vs baseline: -0.5%

Memory: ✅ 37.283MB (SLO: <38.500MB -3.2%) vs baseline: +5.7%

✅ import_many_cached

Time: ✅ 120.723µs (SLO: <130.000µs -7.1%) vs baseline: ~same

Memory: ✅ 37.322MB (SLO: <38.500MB -3.1%) vs baseline: +5.6%

✅ import_many_stdlib

Time: ✅ 1.635ms (SLO: <1.750ms -6.6%) vs baseline: ~same

Memory: ✅ 37.358MB (SLO: <38.500MB -3.0%) vs baseline: +5.3%

✅ import_many_stdlib_cached

Time: ✅ 0.980ms (SLO: <1.100ms 📉 -10.9%) vs baseline: ~same

Memory: ✅ 37.430MB (SLO: <38.500MB -2.8%) vs baseline: +5.3%

✅ import_many_unknown

Time: ✅ 831.554µs (SLO: <890.000µs -6.6%) vs baseline: -1.1%

Memory: ✅ 37.396MB (SLO: <38.500MB -2.9%) vs baseline: +5.2%

✅ import_many_unknown_cached

Time: ✅ 789.022µs (SLO: <870.000µs -9.3%) vs baseline: ~same

Memory: ✅ 37.395MB (SLO: <38.500MB -2.9%) vs baseline: +5.5%

✅ import_one

Time: ✅ 19.859µs (SLO: <30.000µs 📉 -33.8%) vs baseline: +0.2%

Memory: ✅ 37.253MB (SLO: <39.000MB -4.5%) vs baseline: +5.0%

✅ import_one_cache

Time: ✅ 6.261µs (SLO: <10.000µs 📉 -37.4%) vs baseline: -0.4%

Memory: ✅ 37.309MB (SLO: <38.500MB -3.1%) vs baseline: +5.5%

✅ import_one_stdlib

Time: ✅ 18.599µs (SLO: <20.000µs -7.0%) vs baseline: +0.2%

Memory: ✅ 37.273MB (SLO: <38.500MB -3.2%) vs baseline: +5.4%

✅ import_one_stdlib_cache

Time: ✅ 6.402µs (SLO: <10.000µs 📉 -36.0%) vs baseline: +2.6%

Memory: ✅ 37.045MB (SLO: <38.500MB -3.8%) vs baseline: +4.4%

✅ import_one_unknown

Time: ✅ 45.311µs (SLO: <50.000µs -9.4%) vs baseline: -0.5%

Memory: ✅ 37.302MB (SLO: <38.500MB -3.1%) vs baseline: +5.8%

✅ import_one_unknown_cache

Time: ✅ 6.277µs (SLO: <10.000µs 📉 -37.2%) vs baseline: +0.6%

Memory: ✅ 37.175MB (SLO: <38.500MB -3.4%) vs baseline: +4.9%

✅ ratelimiter - 12/12

✅ defaults

Time: ✅ 2.361µs (SLO: <10.000µs 📉 -76.4%) vs baseline: +0.3%

Memory: ✅ 31.733MB (SLO: <34.000MB -6.7%) vs baseline: +4.6%

✅ high_rate_limit

Time: ✅ 2.408µs (SLO: <10.000µs 📉 -75.9%) vs baseline: ~same

Memory: ✅ 31.831MB (SLO: <34.000MB -6.4%) vs baseline: +5.1%

✅ long_window

Time: ✅ 2.360µs (SLO: <10.000µs 📉 -76.4%) vs baseline: +0.5%

Memory: ✅ 31.752MB (SLO: <34.000MB -6.6%) vs baseline: +4.6%

✅ low_rate_limit

Time: ✅ 2.341µs (SLO: <10.000µs 📉 -76.6%) vs baseline: -1.0%

Memory: ✅ 31.831MB (SLO: <34.000MB -6.4%) vs baseline: +5.0%

✅ no_rate_limit

Time: ✅ 0.828µs (SLO: <10.000µs 📉 -91.7%) vs baseline: -1.0%

Memory: ✅ 31.792MB (SLO: <34.000MB -6.5%) vs baseline: +4.7%

✅ short_window

Time: ✅ 2.503µs (SLO: <10.000µs 📉 -75.0%) vs baseline: +0.3%

Memory: ✅ 31.752MB (SLO: <34.000MB -6.6%) vs baseline: +4.9%

✅ recursivecomputation - 8/8

✅ deep

Time: ✅ 309.555ms (SLO: <320.950ms -3.6%) vs baseline: ~same

Memory: ✅ 32.853MB (SLO: <34.500MB -4.8%) vs baseline: +4.8%

✅ deep-profiled

Time: ✅ 327.594ms (SLO: <359.150ms -8.8%) vs baseline: ~same

Memory: ✅ 37.362MB (SLO: <39.000MB -4.2%) vs baseline: +5.3%

✅ medium

Time: ✅ 7.033ms (SLO: <7.400ms -5.0%) vs baseline: -0.3%

Memory: ✅ 32.145MB (SLO: <34.000MB -5.5%) vs baseline: +5.1%

✅ shallow

Time: ✅ 0.947ms (SLO: <1.050ms -9.8%) vs baseline: -0.6%

Memory: ✅ 32.067MB (SLO: <34.000MB -5.7%) vs baseline: +4.5%

✅ samplingrules - 8/8

✅ average_match

Time: ✅ 138.859µs (SLO: <290.000µs 📉 -52.1%) vs baseline: +1.0%

Memory: ✅ 32.165MB (SLO: <34.000MB -5.4%) vs baseline: +5.1%

✅ high_match

Time: ✅ 174.872µs (SLO: <480.000µs 📉 -63.6%) vs baseline: -0.1%

Memory: ✅ 32.204MB (SLO: <34.000MB -5.3%) vs baseline: +5.0%

✅ low_match

Time: ✅ 99.360µs (SLO: <120.000µs 📉 -17.2%) vs baseline: +0.3%

Memory: ✅ 600.834MB (SLO: <700.000MB 📉 -14.2%) vs baseline: +4.8%

✅ very_low_match

Time: ✅ 2.666ms (SLO: <8.500ms 📉 -68.6%) vs baseline: -0.6%

Memory: ✅ 68.358MB (SLO: <75.000MB -8.9%) vs baseline: +4.9%

✅ sethttpmeta - 32/32

✅ all-disabled

Time: ✅ 10.516µs (SLO: <20.000µs 📉 -47.4%) vs baseline: ~same

Memory: ✅ 32.598MB (SLO: <34.000MB -4.1%) vs baseline: +4.8%

✅ all-enabled

Time: ✅ 40.107µs (SLO: <50.000µs 📉 -19.8%) vs baseline: +0.2%

Memory: ✅ 32.558MB (SLO: <34.000MB -4.2%) vs baseline: +4.9%

✅ collectipvariant_exists

Time: ✅ 41.025µs (SLO: <50.000µs 📉 -17.9%) vs baseline: +0.7%

Memory: ✅ 32.539MB (SLO: <34.000MB -4.3%) vs baseline: +4.7%

✅ no-collectipvariant

Time: ✅ 40.294µs (SLO: <50.000µs 📉 -19.4%) vs baseline: +1.0%

Memory: ✅ 32.617MB (SLO: <34.000MB -4.1%) vs baseline: +4.9%

✅ no-useragentvariant

Time: ✅ 38.849µs (SLO: <50.000µs 📉 -22.3%) vs baseline: +0.5%

Memory: ✅ 32.539MB (SLO: <34.000MB -4.3%) vs baseline: +4.9%

✅ obfuscation-no-query

Time: ✅ 40.789µs (SLO: <50.000µs 📉 -18.4%) vs baseline: +0.9%

Memory: ✅ 32.598MB (SLO: <34.000MB -4.1%) vs baseline: +5.0%

✅ obfuscation-regular-case-explicit-query

Time: ✅ 75.594µs (SLO: <90.000µs 📉 -16.0%) vs baseline: ~same

Memory: ✅ 32.952MB (SLO: <34.000MB -3.1%) vs baseline: +4.8%

✅ obfuscation-regular-case-implicit-query

Time: ✅ 76.711µs (SLO: <90.000µs 📉 -14.8%) vs baseline: +0.6%

Memory: ✅ 33.010MB (SLO: <34.000MB -2.9%) vs baseline: +5.0%

✅ obfuscation-send-querystring-disabled

Time: ✅ 154.352µs (SLO: <170.000µs -9.2%) vs baseline: +0.1%

Memory: ✅ 32.971MB (SLO: <34.500MB -4.4%) vs baseline: +4.8%

✅ obfuscation-worst-case-explicit-query

Time: ✅ 148.578µs (SLO: <160.000µs -7.1%) vs baseline: ~same

Memory: ✅ 32.971MB (SLO: <34.500MB -4.4%) vs baseline: +4.7%

✅ obfuscation-worst-case-implicit-query

Time: ✅ 154.921µs (SLO: <170.000µs -8.9%) vs baseline: +0.3%

Memory: ✅ 32.971MB (SLO: <34.500MB -4.4%) vs baseline: +4.7%

✅ useragentvariant_exists_1

Time: ✅ 39.412µs (SLO: <50.000µs 📉 -21.2%) vs baseline: -0.2%

Memory: ✅ 32.598MB (SLO: <34.000MB -4.1%) vs baseline: +5.0%

✅ useragentvariant_exists_2

Time: ✅ 40.556µs (SLO: <50.000µs 📉 -18.9%) vs baseline: +0.3%

Memory: ✅ 32.558MB (SLO: <34.000MB -4.2%) vs baseline: +4.9%

✅ useragentvariant_exists_3

Time: ✅ 40.747µs (SLO: <50.000µs 📉 -18.5%) vs baseline: +1.9%

Memory: ✅ 32.598MB (SLO: <34.000MB -4.1%) vs baseline: +4.9%

✅ useragentvariant_not_exists_1

Time: ✅ 39.331µs (SLO: <50.000µs 📉 -21.3%) vs baseline: -0.3%

Memory: ✅ 32.598MB (SLO: <34.000MB -4.1%) vs baseline: +4.9%

✅ useragentvariant_not_exists_2

Time: ✅ 39.676µs (SLO: <50.000µs 📉 -20.6%) vs baseline: +0.9%

Memory: ✅ 32.499MB (SLO: <34.000MB -4.4%) vs baseline: +4.7%

✅ tracer - 6/6

✅ large

Time: ✅ 30.034ms (SLO: <32.950ms -8.8%) vs baseline: -0.3%

Memory: ✅ 32.971MB (SLO: <34.500MB -4.4%) vs baseline: +5.1%

✅ medium

Time: ✅ 2.923ms (SLO: <3.200ms -8.7%) vs baseline: -1.2%

Memory: ✅ 32.086MB (SLO: <34.000MB -5.6%) vs baseline: +4.5%

✅ small

Time: ✅ 330.058µs (SLO: <370.000µs 📉 -10.8%) vs baseline: -1.1%

Memory: ✅ 32.204MB (SLO: <34.000MB -5.3%) vs baseline: +5.0%

ℹ️ Scenarios Missing SLO Configuration (9 scenarios)

The following scenarios exist in candidate data but have no SLO thresholds configured:

  • coreapiscenario-core_dispatch_listeners
  • coreapiscenario-core_dispatch_no_listeners
  • coreapiscenario-core_dispatch_with_results_listeners
  • coreapiscenario-core_dispatch_with_results_no_listeners
  • djangosimple-baseline
  • errortrackingdjangosimple-baseline
  • errortrackingflasksqli-baseline
  • flasksimple-baseline
  • flasksqli-baseline

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Small performance gain (~1%) in the tracer scenarios.

@brettlangdon brettlangdon marked this pull request as ready for review October 17, 2025 12:55
@brettlangdon brettlangdon requested a review from a team as a code owner October 17, 2025 12:55
@brettlangdon brettlangdon requested a review from mabdinur October 17, 2025 12:55
@brettlangdon brettlangdon enabled auto-merge (squash) October 17, 2025 13:00
P403n1x87
P403n1x87 reviewed Oct 17, 2025
View reviewed changes
ddtrace/_trace/provider.py

# PERF: type(item) is Span is about the same perf as isinstance(item, Span)
# when item is a Span, but slower when item is a Context
if type(item) is Span:
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We don't expect subclasses of Span to ever appear?

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The only one I see in our codebase is:

tests/utils.py:745:class TestSpan(Span):

Not sure when/why we would subclass Span

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@mabdinur mabdinur Awaiting requested review from mabdinur mabdinur is a code owner automatically assigned from DataDog/apm-sdk-capabilities-python

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@brettlangdon @P403n1x87