typelevel / typelevel/cats-effect

Do more benchmarking on ScalaJS tracing

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🥺 help wanted
Dominant language
Scala
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Description

It's important to convince ourselves that we haven't somehow entirely destroyed performance on scalajs. The benchmark results are really inconsistent and it would be immensely helpful if someone who understands V8 and some of ScalaJS were able to help out on this a bit, since it's difficult to explain the numbers we're seeing in #2207.

Running hey benchmarks on http4s-server and even perhaps the Fs2 benchmarks on ScalaJS would probably be the best way to start to get some confidence over how this change manifests in realistic workloads.

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Research direction

Start by reviewing the change and benchmark results referenced in #2207, then run the hey benchmarks on http4s-server and, if useful, the Fs2 benchmarks on ScalaJS. Compare the results across runs and realistic workloads, focusing on V8 and ScalaJS tracing. Done means the inconsistent numbers are characterized well enough to assess whether performance was substantially damaged.

Written by the indexing model from the issue text.

Assessment

Tech stack
scala
Domain
performance
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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