Utility script to profile (n)vim (e.g. startup). For now, only startup time w.r.t. plugins is analyzed. The plugin directory is automatically found.
The script is inspired from vim-plugins-profile, but only depends on Python. It supports the following features:
- run any vim/neovim command,
- detect the plugin directory automatically,
- handle GUI versions,
- compute the average time/standard deviation over multiple runs,
- export the result to a CSV file,
- plot a bar chart.
Required:
- Python 2 or Python 3,
- vim or neovim.
Optional:
- Matplotlib (for bar plot)
To list the available options:
$ vim-profiler.py -husage: vim-profiler.py [-h] [-o CSV] [-p] [-s] [-n N] [-r RUNS] ...
Analyze startup times of vim/neovim plugins.
positional arguments:
cmd vim/neovim executable or command
optional arguments:
-h, --help show this help message and exit
-o CSV Export result to a csv file
-p Plot result as a bar chart
-s Consider system plugins as well (marked with *)
-n N Number of plugins to list in the summary
-r RUNS Number of runs (for average/standard deviation)The text summary looks like this:
$ vim-profiler.py nvim
Running nvim to generate startup logs... done.
Loading and processing logs... done.
Plugin directory: /home/user/.config/nvim/plugged
=====================================
Top 10 plugins slowing nvim's startup
=====================================
1 4.559 vim-fugitive
2 4.162 tcomment_vim
3 3.936 vim-hybrid
4 2.922 lightline.vim
5 1.551 supertab
6 1.522 vim-sneak
7 1.100 ultisnips
8 0.929 fzf.vim
9 0.916 fzf
10 0.877 vim-surround
=====================================As for the plot (using Matplotlib):
$ vim-profiler.py -p -r 10 nvim
=====================================
Top 10 plugins slowing nvim's startup
=====================================
1 3.326 vim-fugitive
2 2.936 tcomment_vim
3 2.315 vim-hybrid
4 1.751 lightline.vim
5 0.959 vim-sneak
6 0.943 supertab
7 0.542 vim-surround
8 0.536 fzf.vim
9 0.450 fzf
10 0.434 auto-pairs
=====================================
You can also use a custom command. Simply write it after the other options:
$ vim-profiler.py vim -u NONE
Running vim to generate startup logs... done.
Loading and processing logs...
No plugin found. Exiting.This is particularly useful if you want to test your plugin manager's lazy loading feature:
$ vim-profiler.py -n 5 nvim foo.cc
Running nvim to generate startup logs... done.
Loading and processing logs... done.
Plugin directory: /home/user/.config/nvim/plugged
====================================
Top 5 plugins slowing nvim's startup
====================================
1 5.613 vim-cpp-enhanced-highlight
2 3.457 vim-fugitive
3 2.864 tcomment_vim
4 2.389 vim-hybrid
5 1.870 lightline.vim
====================================
$ vim-profiler.py -n 5 nvim foo.cc -c ":exec ':normal ia' | :q\!"
Running nvim to generate startup logs... done.
Loading and processing logs... done.
Plugin directory: /home/user/.config/nvim/plugged
====================================
Top 5 plugins slowing nvim's startup
====================================
1 144.766 ultisnips
2 95.977 YouCompleteMe
3 11.408 vim-cpp-enhanced-highlight
4 3.463 vim-fugitive
5 2.992 tcomment_vim
====================================Here ultisnips and YouCompleteMe were only loaded after entering insert
mode.
GPLv3