perf(ast/estree): faster serializing strings to JSON

[overlookmotel]

Speed up serializing strings to JSON, using a trick I found in Chromium's code, to check a batch of 8 bytes in one go for characters needing escaping, rather than checking bytes 1 by 1.

https://chromium.googlesource.com/v8/v8/+/1645281bbd1b183a252835d376166bd210135bbe/src/json/json-stringifier.cc#521

[overlookmotel]

• test(ast/estree): more tests for escaping strings in JSON #11756
• perf(ast/estree): faster serializing strings to JSON #11753 👈 (View in Graphite)
• main

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[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #11753 will degrade performances by 13.11%

_{Comparing 06-16-perf_ast_estree_faster_serializing_strings_to_json (c4faee2) with main (2641030)}

Summary

❌ 1 regressions
✅ 37 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	mangler[cal.com.tsx]	3.1 ms	3.5 ms	-13.11%

[overlookmotel]

1% perf improvement on ESTree benchmark. Would probably show a larger effect on a file which is string-heavy e.g. RadixUI benchmark.

[graphite-app]

Merge activity

• Jun 17, 2:07 AM UTC: Boshen added this pull request to the Graphite merge queue.
• Jun 17, 2:14 AM UTC: Merged by the Graphite merge queue.