Try using std's hashbrown copy

[Zoxc]

Just testing if this affects performance. It may relate to #138708, #137701 and #115747.

[rustbot]

r? @lcnr

rustbot has assigned @lcnr.
They will have a look at your PR within the next two weeks and either review your PR or reassign to another reviewer.

Use r? to explicitly pick a reviewer

[lqd]

@bors try @rust-timer queue

[bors]

⌛ Trying commit 4b74735 with merge 1b2c082...

[bors]

☀️ Try build successful - checks-actions
Build commit: 1b2c082 (1b2c0827aef26c1b0f4fa21c5492be683c9313b9)

[rust-timer]

Finished benchmarking commit (1b2c082): comparison URL.

Overall result: no relevant changes - no action needed

Benchmarking this pull request likely means that it is perf-sensitive, so we're automatically marking it as not fit for rolling up. While you can manually mark this PR as fit for rollup, we strongly recommend not doing so since this PR may lead to changes in compiler perf.

@bors rollup=never
@rustbot label: -S-waiting-on-perf -perf-regression

Instruction count

This benchmark run did not return any relevant results for this metric.

Max RSS (memory usage)

Results (primary -2.3%, secondary -2.8%)

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-2.3%	[-4.0%, -1.5%]	13
Improvements ✅ (secondary)	-2.8%	[-4.9%, -0.7%]	48
All ❌✅ (primary)	-2.3%	[-4.0%, -1.5%]	13

Cycles

Results (secondary -2.4%)

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.4%	[-3.0%, -1.7%]	6
All ❌✅ (primary)	-	-	0

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 774.81s -> 774.875s (0.01%)
Artifact size: 365.53 MiB -> 365.45 MiB (-0.02%)

[lqd]

The max-rss change looks like not noise for once?!