Two small bitset optimisations

[cjgillot]

No description provided.

[rustbot]

r? @petrochenkov

(rustbot has picked a reviewer for you, use r? to override)

[rustbot]

Some changes occurred to MIR optimizations

cc @rust-lang/wg-mir-opt

[cjgillot]

@bors try @rust-timer queue

[bors]

⌛ Trying commit 831f25f with merge f67a248...

[cjgillot]

@bors try @rust-timer queue

[bors]

⌛ Trying commit 7d6b11d with merge ac94b01...

[bors]

☀️ Try build successful - checks-actions
Build commit: ac94b01 (ac94b0166674fe0d08b9b26c2f918c4ec6d15a8e)

[rust-timer]

Finished benchmarking commit (ac94b01): 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

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)	2.9%	[2.9%, 2.9%]	1
Regressions ❌ (secondary)	4.5%	[4.5%, 4.5%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	2.9%	[2.9%, 2.9%]	1

Cycles

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

Binary size

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

Bootstrap: 666.95s -> 669.21s (0.34%)
Artifact size: 311.74 MiB -> 311.75 MiB (0.00%)

[nnethercote]

@bors delegate=cjgillot

Looks good to me, though it would be nice if the changes to clone_from could be reverted, reducing this to just two commits.

[bors]

✌️ @cjgillot, you can now approve this pull request!

If @nnethercote told you to "r=me" after making some further change, please make that change, then do @bors r=@nnethercote

[cjgillot]

@bors r=nnethercote

[bors]

📌 Commit 0adfe20 has been approved by nnethercote

It is now in the queue for this repository.

[bors]

🌲 The tree is currently closed for pull requests below priority 100. This pull request will be tested once the tree is reopened.

[bors]

⌛ Testing commit 0adfe20 with merge efb3f11...

[bors]

☀️ Test successful - checks-actions
Approved by: nnethercote
Pushing efb3f11 to master...

[rust-timer]

Finished benchmarking commit (efb3f11): comparison URL.

Overall result: ✅ improvements - no action needed

@rustbot label: -perf-regression

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-3.7%	[-3.7%, -3.7%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-3.7%	[-3.7%, -3.7%]	1

Max RSS (memory usage)

Results

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)	2.9%	[2.0%, 3.5%]	3
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-4.3%	[-4.3%, -4.3%]	1
All ❌✅ (primary)	-	-	0

Cycles

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

Binary size

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

Bootstrap: 666.487s -> 665.507s (-0.15%)
Artifact size: 308.53 MiB -> 308.52 MiB (-0.00%)