升级

$ upgrade_oh_my_zsh

启动测速

$ time /bin/zsh -i -c exit

$ for i in $(seq 1 10); do /usr/bin/time $SHELL -i -c exit; done

$ for i in $(seq 1 10); do /usr/bin/time bash -i -c exit; done

当默认 shell 为 zsh 时，且当开启一个新 tab 时（或者一台主机通过 SSH 登录本主机时），/etc/zprofile 、/etc/zshrc 和 ~/.zshrc 均会被执行，且执行顺序为：

当开启一个新 tab 时，

Last login: Sat Jun 13 11:46:23 on ttys006
execute /etc/zprofile
execute /etc/zshrc
execute ~/.zshrc

当一台主机通过 SSH 登录本主机时

$ ssh wei.shi@192.168.16.173
Last login: Sat Jun 13 11:54:43 2020
execute /etc/zprofile
execute /etc/zshrc
execute ~/.zshrc
~ $

当启用一个新zsh 进程时

$ zsh
execute /etc/zshrc
execute ~/.zshrc
$

将zsh 的启动脚本中耗时的命令移除，使用 alias，在需要执行的时候，再去执行它们。

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