resolve: Merge `NameBindingKind::Module` into `NameBindingKind::Res` #143458

petrochenkov · 2025-07-04T21:46:46Z

This is a simplification, but also an optimization, because now we load modules from external crates in a more lazy fashion.

rustbot · 2025-07-04T21:46:50Z

r? @SparrowLii

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petrochenkov · 2025-07-04T21:47:13Z

@bors try @rust-timer queue

resolve: Merge `NameBindingKind::Module` into `NameBindingKind::Res` This is a simplification, but also an optimization, because now we load modules from external crates in a more lazy fashion.

bors · 2025-07-04T21:48:23Z

⌛ Trying commit 72a1ac4 with merge d8766c2...

bors · 2025-07-05T00:04:06Z

☀️ Try build successful - checks-actions
Build commit: d8766c2 (d8766c2c7b1ffb11aa0b90c2861b10fc9b1c5c85)

rust-timer · 2025-07-05T03:03:32Z

Finished benchmarking commit (d8766c2): comparison URL.

Overall result: ❌✅ regressions and improvements - please read the text below

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

Next Steps: If you can justify the regressions found in this try perf run, please do so in sufficient writing along with @rustbot label: +perf-regression-triaged. If not, please fix the regressions and do another perf run. If its results are neutral or positive, the label will be automatically removed.

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

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	0.7%	[0.2%, 3.0%]	134
Regressions ❌ (secondary)	0.5%	[0.2%, 1.2%]	47
Improvements ✅ (primary)	-1.1%	[-2.1%, -0.3%]	8
Improvements ✅ (secondary)	-0.5%	[-1.4%, -0.1%]	51
All ❌✅ (primary)	0.6%	[-2.1%, 3.0%]	142

Max RSS (memory usage)

Results (primary -2.7%, secondary -3.6%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	4.3%	[1.2%, 7.7%]	5
Improvements ✅ (primary)	-2.7%	[-7.1%, -0.7%]	21
Improvements ✅ (secondary)	-4.1%	[-12.5%, -1.2%]	80
All ❌✅ (primary)	-2.7%	[-7.1%, -0.7%]	21

Cycles

Results (primary 2.6%, secondary -2.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	2.6%	[2.6%, 2.7%]	2
Regressions ❌ (secondary)	2.3%	[0.7%, 4.1%]	5
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-4.4%	[-9.4%, -1.9%]	9
All ❌✅ (primary)	2.6%	[2.6%, 2.7%]	2

Binary size

Results (primary 1.1%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	1.1%	[1.1%, 1.1%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	1.1%	[1.1%, 1.1%]	1

Bootstrap: 460.645s -> 460.524s (-0.03%)
Artifact size: 372.20 MiB -> 371.76 MiB (-0.12%)

petrochenkov · 2025-07-05T19:56:35Z

@bors try @rust-timer queue

bors · 2025-07-05T19:57:45Z

⌛ Trying commit e33d621 with merge 1556320...

resolve: Merge `NameBindingKind::Module` into `NameBindingKind::Res` This is a simplification, but also an optimization, because now we load modules from external crates in a more lazy fashion.

bors · 2025-07-05T22:12:53Z

☀️ Try build successful - checks-actions
Build commit: 1556320 (155632099e9c457a68936de5f744ba18b66f9fef)

rust-timer · 2025-07-06T00:31:46Z

Finished benchmarking commit (1556320): comparison URL.

Overall result: ❌✅ regressions and improvements - please read the text below

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

Next Steps: If you can justify the regressions found in this try perf run, please do so in sufficient writing along with @rustbot label: +perf-regression-triaged. If not, please fix the regressions and do another perf run. If its results are neutral or positive, the label will be automatically removed.

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

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.3%	[0.0%, 0.8%]	9
Improvements ✅ (primary)	-0.5%	[-2.1%, -0.1%]	28
Improvements ✅ (secondary)	-0.5%	[-1.3%, -0.0%]	57
All ❌✅ (primary)	-0.5%	[-2.1%, -0.1%]	28

Max RSS (memory usage)

Results (primary -3.0%, secondary -3.6%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	4.1%	[1.3%, 6.4%]	4
Improvements ✅ (primary)	-3.0%	[-7.5%, -0.8%]	28
Improvements ✅ (secondary)	-3.8%	[-13.1%, -0.8%]	119
All ❌✅ (primary)	-3.0%	[-7.5%, -0.8%]	28

Cycles

Results (primary -3.8%, secondary -1.6%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	5.0%	[4.4%, 5.6%]	2
Improvements ✅ (primary)	-3.8%	[-3.8%, -3.8%]	1
Improvements ✅ (secondary)	-4.2%	[-9.4%, -1.4%]	5
All ❌✅ (primary)	-3.8%	[-3.8%, -3.8%]	1

Binary size

Results (secondary -0.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.0%	[-0.0%, -0.0%]	1
All ❌✅ (primary)	-	-	0

Bootstrap: 461.008s -> 459.616s (-0.30%)
Artifact size: 372.14 MiB -> 372.19 MiB (0.01%)

petrochenkov · 2025-07-06T20:11:55Z

@rustbot ready

petrochenkov · 2025-07-11T20:57:54Z

ping @SparrowLii
This is a pre-requisite for the import parallelization changes (also not a complex change, just a refactoring).

SparrowLii

The perf result looks good! Can you rebase the change so we can merge it?

petrochenkov · 2025-07-16T05:39:50Z

Rebased.

SparrowLii · 2025-07-16T06:02:08Z

@bors r+

bors · 2025-07-16T06:02:11Z

📌 Commit 7f398fd has been approved by SparrowLii

It is now in the queue for this repository.

bors · 2025-07-16T06:02:12Z

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

bors · 2025-07-16T10:58:45Z

⌛ Testing commit 7f398fd with merge 1c6de21...

bors · 2025-07-16T14:05:31Z

☀️ Test successful - checks-actions
Approved by: SparrowLii
Pushing 1c6de21 to master...

github-actions · 2025-07-16T14:08:23Z

What is this?

This is an experimental post-merge analysis report that shows differences in test outcomes between the merged PR and its parent PR.

Comparing f21fbac (parent) -> 1c6de21 (this PR)

Test differences

Show 26 test diffs

26 doctest diffs were found. These are ignored, as they are noisy.

Test dashboard

Run

cargo run --manifest-path src/ci/citool/Cargo.toml -- \
    test-dashboard 1c6de215099bbe33668de762f9591187f6c25eef --output-dir test-dashboard

And then open test-dashboard/index.html in your browser to see an overview of all executed tests.

Job duration changes

dist-aarch64-linux: 5745.4s -> 8494.2s (47.8%)
x86_64-apple-2: 3900.6s -> 5462.3s (40.0%)
x86_64-apple-1: 6674.6s -> 8178.9s (22.5%)
pr-check-1: 1519.5s -> 1858.9s (22.3%)
pr-check-2: 2327.9s -> 2792.9s (20.0%)
aarch64-apple: 5209.7s -> 5971.3s (14.6%)
x86_64-gnu-llvm-20-1: 3217.8s -> 3646.3s (13.3%)
aarch64-gnu: 6255.4s -> 7024.5s (12.3%)
x86_64-gnu-tools: 3329.4s -> 3734.6s (12.2%)
x86_64-rust-for-linux: 2652.8s -> 2965.1s (11.8%)

How to interpret the job duration changes?

Job durations can vary a lot, based on the actual runner instance
that executed the job, system noise, invalidated caches, etc. The table above is provided
mostly for t-infra members, for simpler debugging of potential CI slow-downs.

[WIP] resolve: Use interior mutability for extern module map Based on #143458. Module map for extern modules is a lazily populated cache, it's not *significantly* mutable. If some logic in name resolver is parallelized, then this cache can be populated from any thread, and without affecting results of any speculative resolution. cc `@LorrensP-2158466`

rust-timer · 2025-07-16T15:17:08Z

Finished benchmarking commit (1c6de21): comparison URL.

Overall result: ❌✅ regressions and improvements - please read the text below

Our benchmarks found a performance regression caused by this PR.
This might be an actual regression, but it can also be just noise.

Next Steps:

If the regression was expected or you think it can be justified,
please write a comment with sufficient written justification, and add
@rustbot label: +perf-regression-triaged to it, to mark the regression as triaged.
If you think that you know of a way to resolve the regression, try to create
a new PR with a fix for the regression.
If you do not understand the regression or you think that it is just noise,
you can ask the @rust-lang/wg-compiler-performance working group for help (members of this group
were already notified of this PR).

@rustbot label: +perf-regression
cc @rust-lang/wg-compiler-performance

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	0.2%	[0.2%, 0.2%]	1
Regressions ❌ (secondary)	0.7%	[0.7%, 0.8%]	3
Improvements ✅ (primary)	-0.5%	[-2.1%, -0.1%]	30
Improvements ✅ (secondary)	-0.4%	[-1.4%, -0.0%]	65
All ❌✅ (primary)	-0.5%	[-2.1%, 0.2%]	31

Max RSS (memory usage)

Results (primary -3.1%, secondary -3.4%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	1.5%	[0.8%, 2.2%]	2
Improvements ✅ (primary)	-3.1%	[-7.1%, -0.5%]	12
Improvements ✅ (secondary)	-3.5%	[-8.1%, -1.1%]	77
All ❌✅ (primary)	-3.1%	[-7.1%, -0.5%]	12

Cycles

Results (primary -2.9%, secondary 4.4%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	5.7%	[2.8%, 10.9%]	6
Improvements ✅ (primary)	-2.9%	[-2.9%, -2.9%]	1
Improvements ✅ (secondary)	-3.5%	[-3.5%, -3.5%]	1
All ❌✅ (primary)	-2.9%	[-2.9%, -2.9%]	1

Binary size

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

Bootstrap: 465.569s -> 464.891s (-0.15%)
Artifact size: 374.85 MiB -> 374.78 MiB (-0.02%)

rustbot assigned SparrowLii Jul 4, 2025

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jul 4, 2025

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rustbot added perf-regression Performance regression. and removed S-waiting-on-perf Status: Waiting on a perf run to be completed. labels Jul 5, 2025

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petrochenkov force-pushed the bindnomod branch from 72a1ac4 to e33d621 Compare July 5, 2025 19:55

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rustbot removed the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Jul 6, 2025

petrochenkov force-pushed the bindnomod branch from e33d621 to d2841e0 Compare July 6, 2025 20:11

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petrochenkov mentioned this pull request Jul 6, 2025

resolve: Use interior mutability for extern module map #143550

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SparrowLii approved these changes Jul 16, 2025

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petrochenkov added 4 commits July 16, 2025 08:28

resolve: Merge NameBindingKind::Module into NameBindingKind::Res

babe2c0

resolve: Remove trait ToNameBinding

01b546a

resolve: Import ty::Visibility everywhere

1a9a226

resolve: Optimize fn traits_in_module

7f398fd

petrochenkov force-pushed the bindnomod branch from d2841e0 to 7f398fd Compare July 16, 2025 05:38

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jul 16, 2025

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Implement unstable trait impl #140399

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bors added the merged-by-bors This PR was explicitly merged by bors. label Jul 16, 2025

bors merged commit 1c6de21 into rust-lang:master Jul 16, 2025
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resolve: Merge NameBindingKind::Module into NameBindingKind::Res #143458

resolve: Merge NameBindingKind::Module into NameBindingKind::Res #143458

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Overall result: ❌✅ regressions and improvements - please read the text below

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Overall result: ❌✅ regressions and improvements - please read the text below

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Test differences

Job duration changes

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Overall result: ❌✅ regressions and improvements - please read the text below

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resolve: Merge `NameBindingKind::Module` into `NameBindingKind::Res` #143458

resolve: Merge `NameBindingKind::Module` into `NameBindingKind::Res` #143458

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