README.md

Benchmarks and Features

Feature	ava	best	baretest	jasmine	jest	mocha	native	pta	tap	tape	tehanu	teru	test	uvu	uvu-cli	zora
Launch	572ms	64ms	66ms	132ms	788ms	216ms	71ms	170ms	1.756s	284ms	64ms	99ms	64ms	96ms	191ms	63ms
Tarball	2.48 MiB	456 B	6.42 KiB	0.15 MiB	8.94 MiB	1.59 MiB	N/A	0.34 MiB	7.80 MiB	0.56 MiB	4.60 KiB	13.50 KiB	0.16 MiB	0.14 MiB	0.14 MiB	20.83 KiB
Unpacked	9.39 MiB	577 B	14.61 KiB	0.54 MiB	35.38 MiB	6.03 MiB	N/A	1.40 MiB	34.79 MiB	2.58 MiB	11.89 KiB	50.80 KiB	1.64 MiB	0.48 MiB	0.48 MiB	0.10 MiB
Reporters	yes	no	no	yes	yes	yes	yes	yes (*)	yes (*)	yes (*)	yes	yes	no	no	no	yes (*)
Async	no	no	no	no	no	no	no	no	no	no	yes	yes	no	no	no	no
Threads	yes	no	no	no	yes	no	no	no	no	no	no	no	no	no	no	no
Continue	yes	no	no	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Bail out	yes	yes	yes	yes	yes	no	yes	no	no	no	yes	yes	no	no	yes	no
Launcher	yes	no	no	yes	yes	yes	yes	yes	yes	yes	no	yes	no	no	yes	no

Metrics

• Launch: Time to launch the test by node or a test runner script (depending on the framework) and execute two short tests - one succeeding and one failing. Measures the execution overhead of the test framework. Important for often test running in the development environment and CI/CD pipelines.
• Tarball: Download size of the package including its dependencies. Measures the installation overhead of the test framework. Important for often build container starting in CI/CD pipelines.
• Unpacked: Unpacked size of the package including its dependencies. Measures the space overhead of the test framework. Important for often build container starting in CI/CD pipelines.
• Reporters: Support for custom reporters. Important for integrations to CI/CD pipelines. (*) means that only TAP format is supported. Any output formatter consuming TAP can be added, for the price of a performance drop.
• Async: Can execute tests and test suites concurrently using promises. Improves performance without using multiple CPUs.
• Threads: Can execute test suites concurrently using worker threads. Improves performance using multiple CPUs if multiple suites are used.
• Continue: Can execute tests after some of them fail. Usual approach in CI/CD pipelines.
• Bail out: Can abort the test execution after the first failure occurs. Usual approach in the development environment.
• Launcher: Was the test run by a launcher script, or were they executed from within the test script? Using a launcher adds an overhead, but offers command-line parameters to control test run without modifying the test sources.