Recent yarn plugin changes add a significant amount to shell startup time

[bjulian5]

Describe the bug

Shell start up time has significantly increased due to a recent change to the Yarn plugin. I ran a git bisect and narrowed down the culprit to this commit f0bbef1 .

Steps to reproduce

With yarn enabled

$for i in $(seq 1 10); do /usr/bin/time zsh -i -c exit; done
        0.36 real         0.22 user         0.10 sys
        0.29 real         0.19 user         0.08 sys
        0.29 real         0.19 user         0.08 sys
        0.32 real         0.21 user         0.09 sys
        0.29 real         0.19 user         0.08 sys
        0.30 real         0.19 user         0.08 sys
        0.30 real         0.19 user         0.08 sys
        0.29 real         0.19 user         0.08 sys
        0.30 real         0.19 user         0.08 sys
        0.29 real         0.19 user         0.08 sys

With Yarn disabled

$ for i in $(seq 1 10); do /usr/bin/time zsh -i -c exit; done
        0.39 real         0.22 user         0.14 sys
        0.12 real         0.07 user         0.04 sys
        0.12 real         0.07 user         0.04 sys
        0.12 real         0.07 user         0.04 sys
        0.12 real         0.07 user         0.04 sys
        0.12 real         0.07 user         0.04 sys
        0.12 real         0.07 user         0.04 sys
        0.12 real         0.07 user         0.04 sys
        0.12 real         0.07 user         0.04 sys
        0.12 real         0.07 user         0.04 sys

Expected behavior

The startup time for the yarn plugin should not take this long to load. I suspect the culprit is the command yarn global bin which was introduced the commit I outlined earlier

$for i in $(seq 1 10); do /usr/bin/time yarn global bin; done
/usr/local/bin
        0.37 real         0.12 user         0.08 sys
/usr/local/bin
        0.16 real         0.11 user         0.04 sys
/usr/local/bin
        0.17 real         0.11 user         0.04 sys
/usr/local/bin
        0.17 real         0.11 user         0.04 sys
/usr/local/bin
        0.17 real         0.11 user         0.04 sys
/usr/local/bin
        0.17 real         0.11 user         0.04 sys
/usr/local/bin
        0.17 real         0.11 user         0.04 sys
/usr/local/bin
        0.17 real         0.11 user         0.04 sys
/usr/local/bin
        0.17 real         0.11 user         0.04 sys
/usr/local/bin
        0.17 real         0.11 user         0.04 sys

Screenshots and recordings

No response

OS / Distro

macOS Montery

Zsh version

5.8

Terminal emulator

alacritty

If using WSL on Windows, which version of WSL

No response

Additional context

No response

[mcornella]

Duplicate of #10290.