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Use usize::repeat_u8 instead of implementing repeat_byte in memchr.rs #118315

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Merged
merged 1 commit into from
Nov 29, 2023
Merged

Use usize::repeat_u8 instead of implementing repeat_byte in memchr.rs #118315

merged 1 commit into from
Nov 29, 2023

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WaffleLapkin
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It's simpler that way and the tricks don't actually make a difference: https://godbolt.org/z/zrvYY1dGx

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rustbot commented Nov 26, 2023

r? @m-ou-se

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@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Nov 26, 2023
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m-ou-se commented Nov 28, 2023

@bors r+ rollup=never

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bors commented Nov 28, 2023

📌 Commit 234e950 has been approved by m-ou-se

It is now in the queue for this repository.

@bors 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 Nov 28, 2023
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bors commented Nov 28, 2023

⌛ Testing commit 234e950 with merge 896f7bf...

bors added a commit to rust-lang-ci/rust that referenced this pull request Nov 28, 2023
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Auto merge of rust-lang#118315 - WaffleLapkin:don't-repeat_byte, r=m-…
896f7bf 
…ou-se

Use `usize::repeat_u8` instead of implementing `repeat_byte` in `memchr.rs`

It's simpler that way and the tricks don't actually make a difference: https://godbolt.org/z/zrvYY1dGx
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The job x86_64-mingw failed! Check out the build log: (web) (plain)

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

---- [rustdoc] tests\rustdoc\intra-doc\builtin-macros.rs stdout ----

error: rustdoc failed!
status: exit code: 0xc00000fd
command: PATH="C:\a\rust\rust\build\x86_64-pc-windows-gnu\stage2\bin;C:\a\rust\rust\build\x86_64-pc-windows-gnu\stage0-bootstrap-tools\x86_64-pc-windows-gnu\release\deps;C:\a\rust\rust\build\x86_64-pc-windows-gnu\stage0\bin;C:\a\rust\rust\ninja;C:\a\rust\rust\mingw64\bin;C:\hostedtoolcache\windows\Python\3.12.0\x64\Scripts;C:\hostedtoolcache\windows\Python\3.12.0\x64;C:\msys64\usr\bin;C:\a\rust\rust\sccache;C:\PROGRA~1\MongoDB\bin;C:\aliyun-cli;C:\vcpkg;C:\cf-cli;C:\Program Files (x86)\NSIS;C:\tools\zstd;C:\Program Files\Mercurial;C:\hostedtoolcache\windows\stack\2.13.1\x64;C:\cabal\bin;C:\ghcup\bin;C:\mingw64\bin;C:\Program Files\dotnet;C:\Program Files\MySQL\MySQL Server 5.7\bin;C:\Program Files\R\R-4.3.2\bin\x64;C:\SeleniumWebDrivers\GeckoDriver;C:\Program Files (x86)\sbt\bin;C:\Program Files (x86)\GitHub CLI;C:\Program Files\Git\bin;C:\Program Files (x86)\pipx_bin;C:\npm\prefix;C:\hostedtoolcache\windows\go\1.20.11\x64\bin;C:\hostedtoolcache\windows\Python\3.7.9\x64\Scripts;C:\hostedtoolcache\windows\Python\3.7.9\x64;C:\hostedtoolcache\windows\Ruby\2.5.9\x64\bin;C:\Program Files\OpenSSL\bin;C:\tools\kotlinc\bin;C:\hostedtoolcache\windows\Java_Temurin-Hotspot_jdk\8.0.392-8\x64\bin;C:\Program Files\ImageMagick-7.1.1-Q16-HDRI;C:\Program Files\Microsoft SDKs\Azure\CLI2\wbin;C:\ProgramData\kind;C:\Program Files\Eclipse Foundation\jdk-8.0.302.8-hotspot\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0;C:\Windows\System32\OpenSSH;C:\ProgramData\Chocolatey\bin;C:\Program Files\PowerShell\7;C:\Program Files\Microsoft\Web Platform Installer;C:\Program Files\Microsoft SQL Server\130\Tools\Binn;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit;C:\Program Files (x86)\Microsoft SQL Server\110\DTS\Binn;C:\Program Files (x86)\Microsoft SQL Server\120\DTS\Binn;C:\Program Files (x86)\Microsoft SQL Server\130\DTS\Binn;C:\Program Files (x86)\Microsoft SQL Server\140\DTS\Binn;C:\Program Files (x86)\Microsoft SQL Server\150\DTS\Binn;C:\Program Files (x86)\Microsoft SQL Server\160\DTS\Binn;C:\Strawberry\c\bin;C:\Strawberry\perl\site\bin;C:\Strawberry\perl\bin;C:\ProgramData\chocolatey\lib\pulumi\tools\Pulumi\bin;C:\Program Files\TortoiseSVN\bin;C:\Program Files\CMake\bin;C:\ProgramData\chocolatey\lib\maven\apache-maven-3.8.7\bin;C:\Program Files\Microsoft Service Fabric\bin\Fabric\Fabric.Code;C:\Program Files\Microsoft SDKs\Service Fabric\Tools\ServiceFabricLocalClusterManager;C:\Program Files\nodejs;C:\Program Files\Git\cmd;C:\Program Files\Git\mingw64\bin;C:\Program Files\Git\usr\bin;C:\Program Files\GitHub CLI;C:\tools\php;C:\Program Files (x86)\sbt\bin;C:\SeleniumWebDrivers\ChromeDriver;C:\SeleniumWebDrivers\EdgeDriver;C:\Program Files\Amazon\AWSCLIV2;C:\Program Files\Amazon\SessionManagerPlugin\bin;C:\Program Files\Amazon\AWSSAMCLI\bin;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\bin;C:\Program Files (x86)\Microsoft BizTalk Server;C:\Program Files\LLVM\bin;C:\Users\runneradmin\.dotnet\tools;C:\Users\runneradmin\.cargo\bin;C:\Users\runneradmin\AppData\Local\Microsoft\WindowsApps" "C:\\a\\rust\\rust\\build\\x86_64-pc-windows-gnu\\stage2\\bin\\rustdoc.exe" "-L" "C:\\a\\rust\\rust\\build\\x86_64-pc-windows-gnu\\stage2\\lib\\rustlib\\x86_64-pc-windows-gnu\\lib" "-L" "C:\\a\\rust\\rust\\build\\x86_64-pc-windows-gnu\\test\\rustdoc\\intra-doc\\builtin-macros\\auxiliary" "-o" "C:\\a\\rust\\rust\\build\\x86_64-pc-windows-gnu\\test\\rustdoc\\intra-doc\\builtin-macros" "--deny" "warnings" "C:\\a\\rust\\rust\\tests\\rustdoc\\intra-doc\\builtin-macros.rs" "-A" "internal_features"
--- stderr -------------------------------

thread 'main' has overflowed its stack
------------------------------------------

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bors commented Nov 28, 2023

💔 Test failed - checks-actions

@bors bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Nov 28, 2023
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error: rustdoc failed!
...
thread 'main' has overflowed its stack

Looks spurious.
@bors retry

@bors 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 Nov 29, 2023
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bors commented Nov 29, 2023

⌛ Testing commit 234e950 with merge abe34e9...

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bors commented Nov 29, 2023

☀️ Test successful - checks-actions
Approved by: m-ou-se
Pushing abe34e9 to master...

@bors bors added the merged-by-bors This PR was explicitly merged by bors. label Nov 29, 2023
@bors bors merged commit abe34e9 into rust-lang:master Nov 29, 2023
@rustbot rustbot added this to the 1.76.0 milestone Nov 29, 2023
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Finished benchmarking commit (abe34e9): comparison URL.

Overall result: ❌ regressions - 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)		 0.1% [0.1%, 0.1%] 1
Improvements ✅
(primary)		 - - 0
Improvements ✅
(secondary)		 - - 0
All ❌✅ (primary) - - 0

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)		 5.1% [5.1%, 5.1%] 1
Improvements ✅
(primary)		 -3.7% [-3.7%, -3.7%] 1
Improvements ✅
(secondary)		 -2.3% [-2.3%, -2.3%] 1
All ❌✅ (primary) -3.7% [-3.7%, -3.7%] 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: 672.005s -> 673.033s (0.15%)
Artifact size: 313.36 MiB -> 313.38 MiB (0.01%)

@WaffleLapkin WaffleLapkin deleted the don't-repeat_byte branch November 29, 2023 20:56
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