Improve echidna printer perf #936

Job	Run time
tests (ubuntu-latest, unit, 3.8)	58s
tests (ubuntu-latest, unit, 3.11)	49s
tests (ubuntu-latest, integration, 3.8)	5m 36s
tests (ubuntu-latest, integration, 3.11)	5m 33s
tests (ubuntu-latest, tool, 3.8)	57s
tests (ubuntu-latest, tool, 3.11)	55s
tests (windows-2022, unit, 3.8)	2m 34s
tests (windows-2022, unit, 3.11)	2m 4s
tests (windows-2022, integration, 3.8)	5m 29s
tests (windows-2022, integration, 3.11)	5m 31s
tests (windows-2022, tool, 3.8)	3m 24s
tests (windows-2022, tool, 3.11)	4m 45s
coverage	1s
	38m 36s

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