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Strip paramenv v2#158041

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jdonszelmann:strip-paramenv-worse
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Strip paramenv v2#158041
jdonszelmann wants to merge 1 commit into
rust-lang:mainfrom
jdonszelmann:strip-paramenv-worse

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@jdonszelmann jdonszelmann commented Jun 17, 2026

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@rustbot rustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. 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 Jun 17, 2026
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@bors try @rust-timer queue

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@rustbot rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Jun 17, 2026
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rust-bors Bot pushed a commit that referenced this pull request Jun 17, 2026
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@bors try cancel

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rust-bors Bot commented Jun 17, 2026

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Try build cancelled. Cancelled workflows:

@jdonszelmann jdonszelmann force-pushed the strip-paramenv-worse branch from 96cadd3 to b121d41 Compare June 17, 2026 18:08
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Oops, left in some debugging infra above, wouldn't be very representative ^^

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rust-bors Bot pushed a commit that referenced this pull request Jun 17, 2026
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☀️ Try build successful (CI)
Build commit: cb7a626 (cb7a6269ba868d578a80bd87fff91573c7871c65)
Base parent: 693b3e4 (693b3e4c6e4e686cb9878c1722ad26858b5f1d2a)

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Finished benchmarking commit (cb7a626): comparison URL.

Overall result: ❌✅ regressions and improvements - please read:

Benchmarking means the PR may be perf-sensitive. It's automatically marked not fit for rolling up. Overriding is possible but disadvised: it risks changing compiler perf.

Next, please: If you can, justify the regressions found in this try perf run in writing along with @rustbot label: +perf-regression-triaged. If not, fix the regressions and do another perf run. Neutral or positive results will clear the label automatically.

@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)
0.3% [0.3%, 0.3%] 1
Regressions ❌
(secondary)
0.3% [0.2%, 0.3%] 2
Improvements ✅
(primary)
-0.7% [-0.7%, -0.7%] 1
Improvements ✅
(secondary)
-2.0% [-4.4%, -0.1%] 26
All ❌✅ (primary) -0.2% [-0.7%, 0.3%] 2

Max RSS (memory usage)

Results (primary -4.8%, secondary -2.6%)

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)
0.8% [0.8%, 0.8%] 1
Improvements ✅
(primary)
-4.8% [-4.8%, -4.8%] 1
Improvements ✅
(secondary)
-2.8% [-17.0%, -1.1%] 18
All ❌✅ (primary) -4.8% [-4.8%, -4.8%] 1

Cycles

Results (secondary -2.4%)

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)
5.5% [4.1%, 6.6%] 4
Improvements ✅
(primary)
- - 0
Improvements ✅
(secondary)
-4.3% [-6.9%, -2.5%] 17
All ❌✅ (primary) - - 0

Binary size

This perf run didn't have relevant results for this metric.

Bootstrap: 522.375s -> 484.553s (-7.24%)
Artifact size: 401.89 MiB -> 391.12 MiB (-2.68%)

@rustbot rustbot added perf-regression Performance regression. and removed S-waiting-on-perf Status: Waiting on a perf run to be completed. labels Jun 17, 2026
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@jdonszelmann jdonszelmann force-pushed the strip-paramenv-worse branch from b121d41 to 388b5bc Compare June 18, 2026 12:15
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@bors try @rust-timer queue

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@rustbot rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Jun 18, 2026
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rust-bors Bot pushed a commit that referenced this pull request Jun 18, 2026
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The job x86_64-gnu-miri failed! Check out the build log: (web) (plain enhanced) (plain)

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

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☀️ Try build successful (CI)
Build commit: 976a309 (976a309544dcb2b72524a059ae887fe4b463e6c4)
Base parent: c55fad5 (c55fad5a9048ad0f7cff2a4867a297647af9392b)

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Finished benchmarking commit (976a309): comparison URL.

Overall result: ❌✅ regressions and improvements - please read:

Benchmarking means the PR may be perf-sensitive. It's automatically marked not fit for rolling up. Overriding is possible but disadvised: it risks changing compiler perf.

Next, please: If you can, justify the regressions found in this try perf run in writing along with @rustbot label: +perf-regression-triaged. If not, fix the regressions and do another perf run. Neutral or positive results will clear the label automatically.

@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% [0.3%, 0.3%] 3
Improvements ✅
(primary)
- - 0
Improvements ✅
(secondary)
-1.4% [-2.5%, -0.3%] 10
All ❌✅ (primary) - - 0

Max RSS (memory usage)

Results (primary -3.9%, secondary -5.5%)

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)
-3.9% [-3.9%, -3.9%] 1
Improvements ✅
(secondary)
-5.5% [-16.6%, -1.5%] 4
All ❌✅ (primary) -3.9% [-3.9%, -3.9%] 1

Cycles

Results (secondary -2.6%)

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)
- - 0
Improvements ✅
(primary)
- - 0
Improvements ✅
(secondary)
-2.6% [-2.8%, -2.4%] 2
All ❌✅ (primary) - - 0

Binary size

Results (primary 0.0%, secondary 0.1%)

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

mean range count
Regressions ❌
(primary)
0.0% [0.0%, 0.0%] 15
Regressions ❌
(secondary)
0.1% [0.1%, 0.1%] 4
Improvements ✅
(primary)
- - 0
Improvements ✅
(secondary)
- - 0
All ❌✅ (primary) 0.0% [0.0%, 0.0%] 15

Bootstrap: 481.592s -> 483.447s (0.39%)
Artifact size: 391.21 MiB -> 391.24 MiB (0.01%)

@rustbot rustbot removed the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Jun 18, 2026
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rust-bors Bot commented Jun 25, 2026

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☔ The latest upstream changes (presumably #156742) made this pull request unmergeable. Please resolve the merge conflicts by rebasing.

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perf-regression Performance regression. S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. 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)

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4 participants