Cancellation performance regression in between 1.8.1 and 1.9.0

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After updating coroutines version from 1.8.1 to 1.9.0 (androidx/androidx@8d8805e), Compose's benchmarks heavily relying on cancellation showed 10% performance regression.

Affected benchmarks include:

• KotlinCoroutinesBenchmark
• EffectsBenchmark

I was able to reproduce the regression locally, and for EffectsBenchmark.launchedEffect_remove with a count parameter set to 100 median execution time dropped from 1.4 msec to 1.6 msec.
KotlinCoroutinesBenchmark.cancelCoroutineScopeWithJobs100's median time dropped from 7.7 msec to 8.2 msec.

It seems like it all might be related to 2803a33, but I was not able to formally confirm that yet.

The issue was originally found and reported by @ShikaSD

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To run benchmarks, you can follow steps from https://github.com/androidx/androidx/blob/androidx-main/CONTRIBUTING.md, namely:

• clone androidx-repo
• launch studio from playground-projects/compose/runtime-playground
• find benchmarks you're willing to run and run them :)