[DONT MERGE], only for windows perf log

[klensy]

Trying to collect etw log from windows builder to check what's going on.

yaml escaping looks sus.

r? @ghost

[klensy]

run: https://github.com/rust-lang/rust/actions/runs/5360795506
First thing found in first seconds of run is EdgeUpdate, actively writing to disk. Yeah, expected.

TODO:

• compare shell variants speed: https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsshell
• current checkout single-thread, try checkout.workers=0 for per-core threads (https://git-scm.com/docs/git-config#Documentation/git-config.txt-checkoutworkers)
• llvm: mt.exe consumes ~20 sec, llvm-tblgen ~ 420 sec
• some of pythons used (https://github.com/rust-lang/rust/actions/runs/5379586926):
  • C:\hostedtoolcache\windows\Python\3.7.9\x64\python3.exe src/ci/cpu-usage-over-time.py
  • C:\hostedtoolcache\windows\Python\3.11.4\x64\python3.exe C:\a\rust\rust//x.py --stage 1 b library
  • C:/ProgramData/chocolatey/bin/python.exe -c "import sys; sys.stdout.write('.'.join([str(x) for x in sys.version_info[:3]]))" redirects to "C:\ProgramData\chocolatey\lib\mingw\tools\install\mingw64\opt\bin\python.exe" -c "import sys; sys.stdout.write('.'.join([str(x) for x in sys.version_info[:3]]))"
• sccache (2018-04-26-sccache-x86_64-pc-windows-msvc, pretty old) spawns a lot (~ 3k ) of conhost processes, fixed by Fix spawning excessive conhost processes on Windows mozilla/sccache#1143, 0.3.1+ version

[bors]

☔ The latest upstream changes (presumably #114148) made this pull request unmergeable. Please resolve the merge conflicts.

[Dylan-DPC]

Closing this at it was an experiment