1、启动耗时分析
正常启动耗时：
time zsh -i -c exit
zsh -i -c exit 3.26s user 8.73s system 93% cpu 12.836 total
简洁模式：
time zsh --no-rcs -i -c exit
zsh --no-rcs -i -c exit 0.00s user 0.01s system 70% cpu 0.010 total
2、分析具体哪些因素导致变慢
（1）vim .zshrc
开启可以用来分析zsh启动耗时
zmodload zsh/zprof
(2)执行命令
~ zsh
~ zprof
num calls time self name
-----------------------------------------------------------------------------------
1) 2 251.69 125.84 62.08% 79.77 39.89 19.68% compinit
2) 1 76.87 76.87 18.96% 76.87 76.87 18.96% compdump
3) 810 73.68 0.09 18.17% 73.68 0.09 18.17% compdef
4) 25 66.65 2.67 16.44% 58.12 2.32 14.34% _omz_source
5) 4 21.74 5.44 5.36% 21.74 5.44 5.36% compaudit
6) 12 13.76 1.15 3.40% 13.76 1.15 3.40% _zsh_highlight_main__type
7) 5 9.99 2.00 2.46% 8.65 1.73 2.13% _zsh_autosuggest_async_request
8) 3 8.24 2.75 2.03% 8.24 2.75 2.03% __sdkman_export_candidate_home
9) 3 7.82 2.61 1.93% 7.82 2.61 1.93% __sdkman_prepend_candidate_to_path
10) 7 28.21 4.03 6.96% 5.82 0.83 1.44% _zsh_highlight
11) 193 6.35 0.03 1.57% 5.33 0.03 1.32% _zsh_autosuggest_bind_widget
12) 1 3.68 3.68 0.91% 3.64 3.64 0.90% _zsh_highlight_load_highlighters
13) 5 21.45 4.29 5.29% 3.24 0.65 0.80% _zsh_autosuggest_bound_1_self-insert
14) 6 19.73 3.29 4.87% 3.09 0.52 0.76% _zsh_highlight_main_highlighter_highlight_list
15) 1 9.36 9.36 2.31% 3.01 3.01 0.74% _zsh_autosuggest_bind_widgets
16) 7 4.93 0.70 1.22% 2.68 0.38 0.66% _zsh_autosuggest_invoke_original_widget
17) 1 2.62 2.62 0.65% 2.62 2.62 0.65% (anon) [/Users/zhangsj190/.oh-my-zsh/tools/check_for_upgrade.sh:157]
18) 6 2.16 0.36 0.53% 2.16 0.36 0.53% url-quote-magic
19) 15 1.97 0.13 0.49% 1.97 0.13 0.49% is-at-least
20) 4 1.84 0.46 0.45% 1.76 0.44 0.44% _zsh_highlight_main_highlighter_check_path
21) 6 16.82 2.80 4.15% 1.74 0.29 0.43% _zsh_autosuggest_modify
22) 1 1.52 1.52 0.37% 1.52 1.52 0.37% omz_termsupport_cwd
23) 1 4.10 4.10 1.01% 1.49 1.49 0.37% handle_update
24) 6 22.08 3.68 5.45% 1.42 0.24 0.35% _zsh_highlight_highlighter_main_paint
25) 1 1.39 1.39 0.34% 1.39 1.39 0.34% test-ls-args
26) 6 28.33 4.72 6.99% 1.18 0.20 0.29% azhw:zle-line-pre-redraw
27) 6 18.51 3.09 4.57% 1.13 0.19 0.28% _zsh_autosuggest_widget_modify
28) 193 1.02 0.01 0.25% 1.02 0.01 0.25% _zsh_autosuggest_incr_bind_count
29) 5 1.51 0.30 0.37% 0.89 0.18 0.22% _zsh_autosuggest_async_response
30) 1 0.72 0.72 0.18% 0.72 0.72 0.18% _zsh_highlight__function_callable_p
31) 6 0.63 0.11 0.16% 0.63 0.11 0.16% _zsh_highlight_main_calculate_fallback
32) 1 0.57 0.57 0.14% 0.57 0.57 0.14% zrecompile
33) 3 0.53 0.18 0.13% 0.51 0.17 0.13% add-zle-hook-widget
(3)优化compinit、compdump、compdef
在.zshrc最后添加以下
# 以下用来优化zsh启动耗时
if [[ -n $(print ~/.zcompdump(Nmh+24)) ]] {
# Regenerate completions because the dump file hasn't been modified within the last 24 hours
compinit
} else {
# Reuse the existing completions file
compinit -C
}
(4)优化_omz_source
3、发现一个巨大的问题，pyenv一直在echo写新的路径到末尾，删掉后就ok了，只保留这4条即可。这时候source就飞快了，打开新的标签也飞快了。和插件其实关系不大。。。
export PYENV_ROOT="$HOME/.pyenv"
export PATH="$PYENV_ROOT/bin:$PATH"
eval "$(pyenv init --path)"
eval "$(pyenv init -)"
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