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@elalemanyo
Last active October 9, 2024 08:47
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Debug zsh startup time

Debug zsh startup time

  1. Inject profiling code

    At the beginning of your .zshrc add following: zmodload zsh/zprof

    and at the end add: zprof

    This will load zprof mod and display what your shell was doing durung your initialization.

  2. Measure startup time

    time zsh -i -c exit

@sharunkumar
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Thanks for guide! Based on this, I would also like to add my approach where I don't have to edit the rc file manually each time to check:

if [ -n "${ZSH_DEBUGRC+1}" ]; then
    zmodload zsh/zprof
fi

# rest of .zshrc script

if [ -n "${ZSH_DEBUGRC+1}" ]; then
    zprof
fi

then I just run:

time ZSH_DEBUGRC=1 zsh -i -c exit

@elalemanyo
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@sharunkumar Thanks! Great idea. Check this to see how I implemented.

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