解决 Conda 拖慢 shell 启动的问题

执行 conda init your_shell_name 之后，指定 shell 的启动脚本会被加入 conda 的配置，使得每次启动时都会花费时间激活 (base) 环境。比如对于 Powershell，被修改的是 profile.ps1；对于 zsh，被修改的是 .zshrc。但是大部分时候我们并不需要使用 conda，为了提高启动速度，我们可以采取以下两种方法之一【搬运自stackoverflow，不作翻译】

1. Use sub-command conda config to change the setting.

conda config --set auto_activate_base false

In fact, the former conda config sub-command is changing configuration file .condarc. We can modify .condarc directly. Add following content into .condarc under your home directory,

auto_activate_base: false

2. Set environment variable CONDA_AUTO_ACTIVATE_BASE in the shell's init file (.bashrc for bash, .zshrc for zsh), before the >>> conda initialize >>> block.

# !! IMPORTANT !! this must go *before* the conda init block
export CONDA_AUTO_ACTIVATE_BASE=false

To convert from the condarc file-based configuration parameter name to the environment variable parameter name, make the name all uppercase and prepend CONDA_. For example, conda’s always_yes configuration parameter can be specified using a CONDA_ALWAYS_YES environment variable.

The environment settings take precedence over corresponding settings in .condarc file.