fix: few performance improvements

[fatih-acar]

Checklist

• [ ] This pull request references any related issue by including "closes <link to issue>"
  • If no issue exists and your change is not a small fix, please create an issue first.
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[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #18136 will not alter performance

_{Comparing fatih-acar:fac-perf-improvements (1e1c7fd) with main (0107f74)}

Summary

✅ 2 untouched benchmarks

[zzstoatzz]

superseded, see: https://github.com/PrefectHQ/prefect/discussions/18150

[fatih-acar]

Hi @zzstoatzz I think you meant to close this PR instead: https://github.com/PrefectHQ/prefect/pull/18135

For this one, the changes are still valable but I just don't have time to run benchmarks for this, yet...

[zzstoatzz]

oof you are totally right - thank you!

[zzstoatzz]

superseded by https://github.com/PrefectHQ/prefect/pull/18314 (for real this time 😅 )