众所周知 Homebrew 很慢
那么，你该出个分身斧，弄个镜像了。

参考
https://www.zhihu.com/question/31360766/answer/749386652

替换 Homebrew

git -C "$(brew --repo)" remote set-url origin https://mirrors.ustc.edu.cn/brew.git

替换 Homebrew Core

git -C "$(brew --repo homebrew/core)" remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.git

替换 Homebrew Cask

git -C "$(brew --repo homebrew/cask)" remote set-url origin https://mirrors.ustc.edu.cn/homebrew-cask.git

替换 Homebrew-bottles

对于 bash 用户：

echo 'export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.ustc.edu.cn/homebrew-bottles' >> ~/.bash_profile
source ~/.bash_profile

对于 zsh 用户：

echo 'export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.ustc.edu.cn/homebrew-bottles' >> ~/.zshrc
source ~/.zshrc