[arturict]

Problem

After #7 the shell starts in about 0.15 s, but every prompt still paid about 60 ms before it was drawn. zprof inside a 50,000-file git repository shows _zsh_autosuggest_bind_widgets as the largest cost per prompt: zsh-autosuggestions re-wraps all ~200 ZLE widgets in a precmd hook before every prompt. The repository also had no CI, so #7 was merged on local checks only.

Changes

• Set ZSH_AUTOSUGGEST_MANUAL_REBIND=1, the option the plugin documents for this cost. The plugin then binds its widgets once, at the first prompt, after all plugins and the theme have defined theirs.
• Add a GitHub Actions workflow: Bash and PowerShell syntax checks, plus a fresh setup.sh --yes install and a second run as an update in an ubuntu:24.04 container. The installer exits non-zero when one of its checks fails, including the Cut interactive zsh startup from 2.4 s to 0.17 s #7 checks for the duplicate Oh My Zsh load and lazy nvm.

Measurements

Ubuntu 24.04 containers on x1, each a fresh setup.sh --yes install with p10k's lean config and a synthetic git repository with 50,000 committed files (one modified, one untracked). Variants interleaved over four rounds, load 3–6, no capped. "main ohne Doppel-Laden" is main before #7 with the duplicate Oh My Zsh load removed by hand.

Metric	main before #7	main before #7, no duplicate load	#7 + this PR
zsh -i -c exit, warm (n = 40)	2125 ms	554 ms	153 ms (−93 %)
zsh -i -c exit, cold¹ (n = 20)	2604 ms	1736 ms	1123 ms (−57 %)
zsh -l -i -c exit, warm (n = 20)	2782 ms	1160 ms	143 ms (−95 %)
Time to first prompt (pty)	42.5 ms	72.2 ms	9.2 ms
Time until a typed-ahead command runs	2105 ms	1245 ms	220 ms (−90 %)
Prompt latency per command, 50k-file repo	121 ms	145 ms	39 ms (−68 %)
compinit per start (zprof, median)	1296 ms (3 calls)	39 ms (2 calls)	33 ms (1 call)

This PR on its own, A/B in the same container (#7 vs #7 + manual rebind, 5 sessions × 6 prompts): prompt latency 96 → 35 ms (−64 %), time until a typed-ahead command runs 217 → 191 ms.

¹ Cold = zcompdump, p10k and setup caches deleted before each run; page cache warm.

Verification

• Widget table (zle -lL, bindkey) after three prompts compared with and without manual rebind: identical except nine widgets p10k wraps at its first prompt (clear-screen, send-break, overwrite-mode, deactivate-region, vi-replace, visual-mode, visual-line-mode, two z4h-*). There the p10k wrapper now sits outside the autosuggest wrapper instead of inside; both call through to the original widget.
• Interactive pty tests on the branch image, all pass: autosuggestion appears for a history entry, Up arrow runs history-substring-search, Tab completes uv pip ins, nvm ls-rem (zsh-completions) and git chec, alias gst works. On main before Cut interactive zsh startup from 2.4 s to 0.17 s #7, Up arrow and git completion fail because the second Oh My Zsh load rebinds them.
• Installer: fresh install passes all 68 checks (74 s).
• PowerShell proxy from Cut interactive zsh startup from 2.4 s to 0.17 s #7, pwsh 7.6 on Linux with real gh, uv and uvx: profile start 1256 → 768 ms (−39 %, n = 20). Not measured on Windows.

Rollout

Ubuntu/WSL: devhub update. Windows: irm https://raw.githubusercontent.com/arturict/zsh-setup/main/setup.ps1 | iex.

Model/harness: Claude Opus 5.5 in Claude Code (T3 Code).

🤖 Generated with Claude Code