Fold predicate fast path in canonicalizer and eager resolver #141442

compiler-errors · 2025-05-23T12:41:02Z

See individual commits.

r? lcnr

compiler-errors · 2025-05-23T12:41:15Z

@bors try @rust-timer queue

Fold predicate fast path in canonicalizer and eager resolver r? lcnr

bors · 2025-05-23T12:42:25Z

⌛ Trying commit e348ad2 with merge daa40a5...

compiler-errors · 2025-05-23T13:25:04Z

@bors try

Fold predicate fast path in canonicalizer and eager resolver r? lcnr

bors · 2025-05-23T13:26:15Z

⌛ Trying commit 9ef3953 with merge 6794d8c...

compiler-errors · 2025-05-23T13:28:29Z

ok final time i promise, sorry bors

@bors try @rust-timer queue

Fold predicate fast path in canonicalizer and eager resolver r? lcnr

bors · 2025-05-23T13:29:40Z

⌛ Trying commit f96b8d5 with merge ed70264...

bors · 2025-05-23T15:25:14Z

☀️ Try build successful - checks-actions
Build commit: ed70264 (ed70264c6bb3cfdda1a0288aeaabcde9e1aea37f)

rust-timer · 2025-05-23T17:33:10Z

Finished benchmarking commit (ed70264): comparison URL.

Overall result: ✅ improvements - 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 is the most reliable metric that we have; it was used to determine the overall result at the top of this comment. However, even this metric can sometimes exhibit noise.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-5.7%	[-15.7%, -0.1%]	16
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary -1.5%, secondary -2.1%)

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%	[2.9%, 2.9%]	1
Improvements ✅ (primary)	-1.5%	[-1.5%, -1.5%]	1
Improvements ✅ (secondary)	-4.6%	[-6.8%, -2.5%]	2
All ❌✅ (primary)	-1.5%	[-1.5%, -1.5%]	1

Cycles

Results (secondary -5.9%)

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)	-5.9%	[-11.4%, -1.8%]	10
All ❌✅ (primary)	-	-	0

Binary size

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

Bootstrap: 777.568s -> 776.075s (-0.19%)
Artifact size: 365.56 MiB -> 365.59 MiB (0.01%)

Kobzol · 2025-05-23T18:01:42Z

Great results! Only ~10x diff on nalgebra now, gogogo! 😆

bors · 2025-05-24T18:29:00Z

☔ The latest upstream changes (presumably #141506) made this pull request unmergeable. Please resolve the merge conflicts.

compiler/rustc_next_trait_solver/src/canonicalizer.rs

compiler-errors · 2025-05-26T08:51:08Z

@/bors treeclosed=10 (edited to prevent future pickup during sync)
@bors p=10

compiler-errors · 2025-05-26T08:51:15Z

(CI issues it seems)

Fold predicate fast path in canonicalizer and eager resolver See individual commits. r? lcnr

bors · 2025-05-26T08:52:33Z

⌛ Testing commit ade2435 with merge 070bcfc...

compiler-errors · 2025-05-26T08:53:38Z

@bors p=9 retry

compiler-errors · 2025-05-26T08:53:43Z

@bors p=0

rust-log-analyzer · 2025-05-26T09:00:47Z

A job failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

##[endgroup]
Image input checksum 3711b88b1827324ae8d9427cc0069e3335cb839f385c7f0dee4e0f5553e44567b4e82a97a5f4e2874946211296ffd47e2671327064f5333830f9e2a7c13abe68
##[group]Building docker image for dist-i686-linux
Docker version 28.0.4, build b8034c0
Error response from daemon: Get "https://ghcr.io/v2/": Get "https://ghcr.io/token?account=rust-lang&client_id=docker&offline_token=true&service=ghcr.io": net/http: request canceled (Client.Timeout exceeded while awaiting headers) (Client.Timeout exceeded while awaiting headers)
##[error]Process completed with exit code 1.
Post job cleanup.

Kobzol · 2025-05-26T09:03:24Z

GitHub is currently borked :( https://www.githubstatus.com/

rust-log-analyzer · 2025-05-26T09:34:52Z

A job failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

##[endgroup]
Image input checksum af9f5e48d80befc25dc70c04d5246097cd4bfc6df4ab3b0cbe75b2e77ad98a0214e32db6526cf0487e06d5fd3576da10e4d9c5ae3543ae4494de13bb237e75cb
##[group]Building docker image for test-various
Docker version 28.0.4, build b8034c0
Error response from daemon: Get "https://ghcr.io/v2/": Get "https://ghcr.io/token?account=rust-lang&client_id=docker&offline_token=true&service=ghcr.io": net/http: request canceled (Client.Timeout exceeded while awaiting headers) (Client.Timeout exceeded while awaiting headers)
##[error]Process completed with exit code 1.
Post job cleanup.

fee1-dead · 2025-05-26T10:28:10Z

@/bors treeclosed- (edited to prevent future pickup during sync)

Seems to be resolved.

bors · 2025-05-26T13:42:33Z

⌛ Testing commit ade2435 with merge 9c0bcb5...

bors · 2025-05-26T17:02:04Z

☀️ Test successful - checks-actions
Approved by: lcnr
Pushing 9c0bcb5 to master...

github-actions · 2025-05-26T17:05:23Z

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 b5eb989 (parent) -> 9c0bcb5 (this PR)

Test differences

No test diffs found

Test dashboard

Run

cargo run --manifest-path src/ci/citool/Cargo.toml -- \
    test-dashboard 9c0bcb514f49cd1e6a30affb2fe4cfca060129a2 --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

aarch64-apple: 7237.0s -> 4627.1s (-36.1%)
aarch64-gnu-debug: 3950.1s -> 4901.5s (24.1%)
dist-aarch64-apple: 5166.3s -> 6152.9s (19.1%)
x86_64-apple-2: 4591.8s -> 5442.5s (18.5%)
dist-x86_64-apple: 9773.2s -> 11397.7s (16.6%)
x86_64-apple-1: 8466.3s -> 7165.6s (-15.4%)
dist-apple-various: 5486.3s -> 5912.7s (7.8%)
x86_64-gnu-aux: 6163.2s -> 5841.6s (-5.2%)
dist-x86_64-msvc-alt: 7515.2s -> 7797.8s (3.8%)
x86_64-msvc-2: 6962.4s -> 6716.0s (-3.5%)

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.

rust-timer · 2025-05-26T20:55:45Z

Finished benchmarking commit (9c0bcb5): comparison URL.

Overall result: ✅ improvements - no action needed

@rustbot label: -perf-regression

Instruction count

This is the most reliable metric that we have; it was used to determine the overall result at the top of this comment. However, even this metric can sometimes exhibit noise.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-6.1%	[-15.7%, -0.2%]	15
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary -0.0%, 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)	1.4%	[1.3%, 1.5%]	2
Regressions ❌ (secondary)	3.3%	[3.3%, 3.3%]	1
Improvements ✅ (primary)	-2.9%	[-2.9%, -2.9%]	1
Improvements ✅ (secondary)	-5.2%	[-6.8%, -3.6%]	2
All ❌✅ (primary)	-0.0%	[-2.9%, 1.5%]	3

Cycles

Results (secondary -6.3%)

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)	-6.3%	[-11.9%, -2.3%]	12
All ❌✅ (primary)	-	-	0

Binary size

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

Bootstrap: 775.728s -> 777.056s (0.17%)
Artifact size: 366.25 MiB -> 366.33 MiB (0.02%)

add additional `TypeFlags` fast paths Some crates, e.g. `diesel`, have items with a lot of where-clauses (more than 150). In these cases checking the `TypeFlags` of the whole `param_env` can be very beneficial. This adds `fn fold_clauses` to mirror the existing `fn visit_clauses` and then uses this in folders which fold `ParamEnv`s. Split out from #141451, depends on #141442. r? `@compiler-errors`

add additional `TypeFlags` fast paths Some crates, e.g. `diesel`, have items with a lot of where-clauses (more than 150). In these cases checking the `TypeFlags` of the whole `param_env` can be very beneficial. This adds `fn fold_clauses` to mirror the existing `fn visit_clauses` and then uses this in folders which fold `ParamEnv`s. Split out from rust-lang/rust#141451, depends on rust-lang/rust#141442. r? `@compiler-errors`

rustbot assigned lcnr May 23, 2025

rustbot added T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. WG-trait-system-refactor The Rustc Trait System Refactor Initiative (-Znext-solver) labels May 23, 2025

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rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label May 23, 2025

bors added a commit that referenced this pull request May 23, 2025

Auto merge of #141442 - compiler-errors:fast-path-pred, r=<try>

daa40a5

Fold predicate fast path in canonicalizer and eager resolver r? lcnr

compiler-errors force-pushed the fast-path-pred branch 2 times, most recently from 951526f to 9ef3953 Compare May 23, 2025 13:25

bors added a commit that referenced this pull request May 23, 2025

Auto merge of #141442 - compiler-errors:fast-path-pred, r=<try>

6794d8c

Fold predicate fast path in canonicalizer and eager resolver r? lcnr

compiler-errors force-pushed the fast-path-pred branch from 9ef3953 to f96b8d5 Compare May 23, 2025 13:28

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bors added a commit that referenced this pull request May 23, 2025

Auto merge of #141442 - compiler-errors:fast-path-pred, r=<try>

ed70264

Fold predicate fast path in canonicalizer and eager resolver r? lcnr

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rustbot removed the S-waiting-on-perf Status: Waiting on a perf run to be completed. label May 23, 2025

compiler-errors force-pushed the fast-path-pred branch from f96b8d5 to 8bbafd0 Compare May 24, 2025 17:25

compiler-errors marked this pull request as ready for review May 24, 2025 17:25

rustbot added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label May 24, 2025

Fast path fold_predicate in old canonicalizer

84a3255

compiler-errors force-pushed the fast-path-pred branch from 8bbafd0 to d3ce9de Compare May 25, 2025 14:12

lcnr reviewed May 25, 2025

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compiler/rustc_next_trait_solver/src/canonicalizer.rs Outdated Show resolved Hide resolved

bors added the S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. label May 26, 2025

bors added a commit that referenced this pull request May 26, 2025

Auto merge of #141442 - compiler-errors:fast-path-pred, r=lcnr

070bcfc

Fold predicate fast path in canonicalizer and eager resolver See individual commits. r? lcnr

This was referenced May 26, 2025

dist: make sure llvm-project submodule is present #141568

Merged

bootstrap: translate Windows paths in a way that works for both Cygwin and MSYS2 #141556

Merged

This was referenced May 26, 2025

Properly analyze captures from unsafe binders #141433

Merged

interpret: do not force_allocate all return places #141406

Merged

further deduplicate ast visitor code #141449

Merged

Don't rerun goals if none of their vars have changed #141500

Merged

lcnr mentioned this pull request May 26, 2025

add additional TypeFlags fast paths #141581

Merged

bors added the merged-by-bors This PR was explicitly merged by bors. label May 26, 2025

bors merged commit 9c0bcb5 into rust-lang:master May 26, 2025
7 checks passed

rustbot added this to the 1.89.0 milestone May 26, 2025

bors mentioned this pull request May 26, 2025

add more TypeFlags fast paths, cache param_env canonicalization #141451

Open

lcnr mentioned this pull request May 29, 2025

Next-generation trait solver rust-lang/rust-project-goals#113

Open

4 tasks

Fold predicate fast path in canonicalizer and eager resolver #141442

Fold predicate fast path in canonicalizer and eager resolver #141442

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Overall result: ✅ improvements - no action needed

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Test differences

Job duration changes

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Overall result: ✅ improvements - no action needed

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compiler-errors commented May 23, 2025 •

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