pint --parallel slower on mac

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描述

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

貢獻者指南

研究方向: 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.
技術棧: php
領域: clideveloper experience
議題類型: 效能
難度: 3
預計時間: 1-3 小時
活動狀態: 活躍
清晰度: 清晰
前置要求: Basic PHP knowledgeUnderstanding of parallel processing concepts
新手友善度: 40