Jan de Mooij 431960e0a8 Bug 1905117 part 5 - Use JS string arena for StringBuffers allocated in SpiderMonkey. r=sfink,emilio
This avoids some regressions on a few Speedometer 3 (async) sub tests.

The problem is likely more jemalloc lock contention during GC when using the
main malloc heap. Using SpiderMonkey's string buffer arena avoids that and
matches previous behavior better.

Differential Revision: https://phabricator.services.mozilla.com/D215522
2024-07-09 12:15:50 +00:00
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