Development

Profiling

Launch Vim: vim --startuptime startuptime.log.
Look at log:

144.523  000.106  000.106: sourcing /opt/homebrew/share/vim/vim91/plugin/vimballPlugin.vim
144.697  000.118  000.118: sourcing /opt/homebrew/share/vim/vim91/plugin/zipPlugin.vim
144.699  002.552: loading plugins
144.700  000.001: loading packages
144.723  000.023: loading after plugins

Columns:

• 144.723 - 144 mills from start vim.
• 000.023 - time (mills) absolutely.

You can debug and profile particular function or file. Example for profile all functions:

:profile start all_funcs.log
:profile func *
:profile file *

In all_funcs.log you can see execution time for captured functions. Start from end of log file, where placed function names, like TOC.
More details and examples: :help profile