Track tokio performance regression (1.48) and upcoming fix in 1.49

[eval-exec]

Benchmark results show ~4% performance slowdown in CKB due to the update to tokio@1.48 compared to the previous version. tokio-rs/tokio#7692

A fix addressing this slowdown has been merged upstream and is expected in the upcoming tokio@1.49 release.

Since tokio@1.49 is not yet released, this issue tracks the performance impact and plans to upgrade once 1.49 is published.

• Observed ~4% slowdown in benchmarks with tokio@1.48
• Upstream includes a fix for this performance regression
• tokio@1.49 release is pending

We should plan to upgrade tokio to 1.49 after its release to regain performance.

[driftluo]

https://github.com/tokio-rs/tokio/releases/tag/tokio-1.49.0 release with runtime: revert "replace manual vtable definitions with Wake" (https://github.com/tokio-rs/tokio/pull/7699) now

[francojaf]

Mmm