laravel/pint

pint --parallel slower on mac

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#421 opened on 2026年2月12日

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help wanted

説明

Pint Version

1.27.1

PHP Version

8.4.17

Description

pint is slower using --parallel option on Mac Mini M4 base model (10-core CPU with 4 performance cores and 6 energy-efficient cores)

Don't know why, maybe it doesn't use the perf-cores ?

~/D/project/project develop ❱ time pint --parallel

PASS .................... 596 files
________________________________________________________
Executed in  810.74 millis    fish           external
   usr time    3.14 secs    277.00 micros    3.14 secs
   sys time    0.78 secs    980.00 micros    0.78 secs

~/D/project/project develop ❱ time pint
 
 PASS .................... 596 files
________________________________________________________
Executed in  289.43 millis    fish           external
   usr time  212.91 millis  234.00 micros  212.67 millis
   sys time   70.71 millis  858.00 micros   69.85 millis

It is faster using --max-processes 4 but slower than no parallelism.

~/D/project/project develop• ❱ time pint --parallel --max-processes 4

 PASS .................... 596 files
________________________________________________________
Executed in  609.86 millis    fish           external
   usr time    1.14 secs    270.00 micros    1.14 secs
   sys time    0.23 secs    967.00 micros    0.23 secs

3 secs with pint --parallel 1.2 secs with pint --parallel --max-processes 4 0.9 secs with pint --parallel --max-processes 3 0.6 secs with pint --parallel --max-processes 2 0.4 secs with pint --parallel --max-processes 1 0.2 secs with pint

Steps To Reproduce

pint --parallel

コントリビューターガイド

技術スタック
php
領域
clideveloper experience
Issue 種別
performance
難度新しい貢献者にとっての実装難度です。1 は非常に小さな変更、5 は専門的な作業です。
3
推定時間経験ある貢献者が調査、実装、テスト、pull request 準備にかけるおおよその時間範囲です。
1-3 hours
活動状況Issue が今どれだけ取り組みやすいかを示します。新しい、活発、古い、ブロック中、またはメンテナー入力待ちなどです。
active
明確さ期待される変更、受け入れ条件、次の手順がどれだけ明確かを示します。
clear
前提条件
Basic PHP knowledgeUnderstanding of parallel processing concepts
初心者向け度初回貢献者にどれだけ取り組みやすいかを 1-100 で推定したスコアです。
40
調査方針
Investigate the parallel processing implementation in Pint, likely using Symfony Process component. Check how the default number of processes is determined (e.g., based on CPU core count) and whether it adequately handles Macs with heterogeneous cores (e.g., performance vs efficiency cores). Look at source code for initializing parallel workers and consider adding auto detection of optimal process count based on system performance. The issue shows that setting max processes to lower values improves performance, so the default might be spawning too many processes.