perf(zsh): resolve brew --prefix at template time and cache completions#13
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Zsh startup was ~5.6s due to 11 runtime `brew --prefix` subshell calls (~450ms), `gt completion` (~390ms), and `op completion zsh` (4-11s). - Resolve all `brew --prefix` calls at `chezmoi apply` time using the `output` template function instead of runtime `$()` subshells - Cache `gt completion` and `zoxide init` output to $XDG_CACHE_HOME/zsh/ (generated once, sourced thereafter) - Remove duplicate asdf sourcing (was in both zshrc and tools.zsh) - Replace `which` with `command -v` (shell builtin, no fork) To invalidate completion caches: rm ~/.cache/zsh/*.zsh Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Zsh startup was measured at ~5.6s. The dominant costs were
op completion zsh(4-11s, already cached in a prior commit), 11 runtimebrew --prefixsubshell calls (~450ms total),gt completion(~390ms), andzoxide init(~25ms).All
brew --prefixcalls are now resolved atchezmoi applytime using theoutputtemplate function. The rendered config contains literal/opt/homebrewpaths instead of forking Ruby on every shell init. The llvm check was also corrected from-n(always true sincebrew --prefixreturns a path regardless of install state) to-d(checks the directory actually exists).Graphite and zoxide initialization output is cached to
$XDG_CACHE_HOME/zsh/on first use and sourced from disk on subsequent inits. Runrm ~/.cache/zsh/*.zshto force regeneration after tool upgrades.A duplicate asdf sourcing was removed — it was loaded in both the zshrc darwin block and
tools.zsh, resulting in three unnecessarybrew --prefix asdfcalls. Thetools.zshcopy is kept since it also sets the required env vars.All
whichcalls replaced withcommand -v(shell builtin, avoids forking an external process).Expected startup improvement from ~5.6s to under 0.5s.
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