Mark Rousskov da58efb11d Improve VecCache under parallel frontend ... This replaces the single Vec allocation with a series of progressively larger buckets. With the cfg for parallel enabled but with -Zthreads=1, this looks like a slight regression in i-count and cycle counts (<0.1%). With the parallel frontend at -Zthreads=4, this is an improvement (-5% wall-time from 5.788 to 5.4688 on libcore) than our current Lock-based approach, likely due to reducing the bouncing of the cache line holding the lock. At -Zthreads=32 it's a huge improvement (-46%: 8.829 -> 4.7319 seconds).		2024-11-15 18:20:32 -05:00
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src	Improve VecCache under parallel frontend	2024-11-15 18:20:32 -05:00
Cargo.toml	Update rustc-hash to version 2	2024-10-20 00:12:49 -07:00