Dmitry Gozman eed6a10f3f
fix(tracing): speed up trace recording (#30946)
This includes two major changes:
- reuse `SerializedFS` for live test runner tracing;
- merge scheduled `appendFile` operations into a single `fs` call.

In some cases, this improves performance of UI mode by 61% and
performance of `trace: on` mode by 38%. Note that performance
improvement on the average test will not be as noticeable.

References #30875, #30635.
2024-05-22 15:19:32 -07:00
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2024-05-08 19:40:03 +01:00
2024-05-01 22:13:00 +00:00