Support request: zsh load is slow

[brc-dd]

Checks

• I ran cw doctor in the affected command line session and it didn't resolve my issue
• I ran cw restart and it didn't resolve my issue
• I searched the discussions in this repo and there are no duplicates of my issue

Expected behaviour

codewhisperer/shell/zshrc.(pre|post).zsh should take only few ms.

Actual behaviour

Currently it takes about a second before one can type any command. It was not this noticeable on fig. And it seems like the shell is init twice -- so if you start typing just after opening, a part of command is lost. Can the performance of code whisperer be improved? Maybe some parts can use zsh_async or something 👀

Edit: Sometimes it's faster -- like under 200-300ms. Is this dependent on network?

Steps to reproduce

Add this to top and bottom of ~/.zshrc:

echo start - "$(perl -MTime::HiRes=time -e 'printf "%.9f\n", time')"

# codewhisperer stuff

echo end - "$(perl -MTime::HiRes=time -e 'printf "%.9f\n", time')"

One can get stuff like this:

start - 1711188760.072175026
start - 1711188760.361670971
end - 1711188760.979902935

You can also try time zsh -i -c exit. It results in output similar to this:

zsh -i -c exit  0.19s user 0.08s system 51% cpu 0.509 total

zprof doesn't show anything useful

Environment

CODEWHISPERER-details:
  - 0.15.1
hardware-info:
  - model: 
  - model-id: 
  - chip-id: Apple M2 Pro
  - cores: 10
  - mem: 16.00 GB
os-info:
  - macOS 14.4.0 (23E214)
environment:
  - shell: /bin/zsh
  - terminal: vscode
  - cwd: /Users/divyansh/foo
  - exe-path: /Users/divyansh/.local/bin/cw
  - install-method: brew
  - env-vars:
    - CWTERM_SESSION_ID: ac365cc8f36f495e8a43c0e957a8f20d
    - CW_SET_PARENT: ac365cc8f36f495e8a43c0e957a8f20d
    - CW_SET_PARENT_CHECK: 1
    - CW_TERM: 0.15.1
    - PATH: /usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/Library/Apple/usr/bin:/Users/divyansh/.composer/vendor/bin:/Users/divyansh/.deno/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/Users/divyansh/.local/bin:/Users/divyansh/Library/Application Support/JetBrains/Toolbox/scripts
    - SHELL: /bin/zsh
    - TERM: xterm-256color
    - ZDOTDIR: /Users/divyansh
    - __CFBundleIdentifier: com.microsoft.VSCode

[bennygoldman]

Seconding this

[kyc20010501]

My zsh startup is very slow, but after closing CW it will return to normal startup speed

[fangzhengjin]

Seconding this

[grant0417]

I will investigate this issue

[alcpereira]

Same issue here.

I debugged my entire ZSH config to double check, and CW is the the main issue.

# Running `for i in $(seq 1 20); do /usr/bin/time /bin/zsh -i -c exit; done`
# With CW
        0.97 real         0.27 user         0.16 sys
        0.93 real         0.27 user         0.15 sys
        0.79 real         0.25 user         0.14 sys
        0.75 real         0.26 user         0.13 sys
        0.77 real         0.25 user         0.13 sys
        0.76 real         0.25 user         0.14 sys
        0.75 real         0.25 user         0.13 sys
        0.76 real         0.25 user         0.13 sys
        0.76 real         0.25 user         0.14 sys
        0.76 real         0.25 user         0.13 sys
        0.79 real         0.26 user         0.14 sys
        0.81 real         0.26 user         0.14 sys
        0.76 real         0.25 user         0.14 sys
        0.78 real         0.25 user         0.14 sys
        0.75 real         0.25 user         0.14 sys
        0.81 real         0.27 user         0.14 sys
        0.72 real         0.25 user         0.13 sys
        0.78 real         0.25 user         0.14 sys
        0.81 real         0.27 user         0.14 sys
        0.84 real         0.27 user         0.15 sys
# Without CW
        0.28 real         0.05 user         0.09 sys
        0.25 real         0.05 user         0.08 sys
        0.25 real         0.05 user         0.08 sys
        0.26 real         0.05 user         0.08 sys
        0.24 real         0.05 user         0.08 sys
        0.25 real         0.05 user         0.08 sys
        0.26 real         0.05 user         0.08 sys
        0.26 real         0.05 user         0.09 sys
        0.25 real         0.05 user         0.08 sys
        0.27 real         0.05 user         0.08 sys
        0.26 real         0.05 user         0.08 sys
        0.37 real         0.06 user         0.10 sys
        0.27 real         0.05 user         0.09 sys
        0.27 real         0.05 user         0.09 sys
        0.26 real         0.05 user         0.08 sys
        0.30 real         0.05 user         0.08 sys
        0.27 real         0.05 user         0.08 sys
        0.29 real         0.05 user         0.09 sys
        0.27 real         0.05 user         0.09 sys
        0.25 real         0.05 user         0.09 sys

I tried toggling every other block from my config, none of them has a significant impact like CW has (as you can see slowing down by 200%).

This is a major blocker for me as I recently switched from p10k to Starship and I no longer have instant prompt.

[christofferbergj]

Seconding this.

Using fish shell:

fish --profile-startup /tmp/startup.prof
sort -nk2 /tmp/startup.prof | tail -n 15

Codewhisperer is by far what takes the longest time.

7189	13837	-> starship init fish | source
88	25546	> builtin source /Users/christofferbergj/.config/fish/config.fish
520	45169	--------> for func in (functions -n)...
6	45180	-------> if not set -q argv[1]...
11	45214	------> alias
782	45996	-----> command cw _ pre-cmd --alias (alias) &> /dev/null &
4	46000	----> begin...

# culprit here
163129	163129	----> ~/.local/bin/cw init fish post --rcfile 99_fig_post | string split0
188559	188559	----> ~/.local/bin/cw init fish pre --rcfile 00_fig_pre | string split0

173	190026	---> eval (~/.local/bin/cw init fish pre --rcfile 00_fig_pre | string split0)
67	190131	--> source $file
274	210016	---> eval (~/.local/bin/cw init fish post --rcfile 99_fig_post | string split0)
39	210071	--> source $file
177	401973	-> for file in $__fish_config_dir/conf.d/*.fish $__fish_sysconf_dir/conf.d/*.fish $__fish_vendor_confdirs/*.fish...
704	404789	> builtin source /opt/homebrew/Cellar/fish/3.7.1/share/fish/config.fish

[Apocalypsor]

Version 0.14.1 does not have this issue. Starting from 0.15.0, this issue appears.

[grant0417]

I have identified the issue here, we will release a fix early this week.

[grant0417]

This issue has been fixed and is public in version 0.15.2. You can run cw update to get the latest version.