Performance issues

[mpfusion]

While I really like your plugin, it makes vim unusably slow.

How to reproduce

wget https://raw.github.com/Yggdroot/indentLine/42cf0572926b9c415d2275e040bdcc60c33f9096/after/plugin/indentLine.vim
vim -N -u NONE -S indentLine.vim \
  -c 'syntax on|help grep|wincmd L|set relativenumber|norm 60G'

Then navigate up and down using j and k.

Result

Vim maxes out my 2GHz CPU and becomes unusably slow.

Expected result

A slight impact on performance but definitely not maxing out the CPU and slowing vim down that much.

Version

• indentLine: 42cf057292
• vim: 7.4b BETA, Included patches: 1-15

[luan]

I am having the same problem here. The longer the file is the worse it gets.

[amadeus]

I can confirm that performance is quite slow, also on Vim 7.4, with patches 1-7.

[ajpaulson]

Same for me (vim 7.4 from Debian Sid)

[longwhale]

Very slow for me. (Vim 7.4 on Windows 7 32-bit)

[jtmkrueger]

Yea, this is even crushing macVim for me which is usually really fast.

[Yggdroot]

The performance issue depends on the files, has no relation with version of vim. If the file does not have many Long lines, the performance is good, for example the c code file. I update the plugin recently, if you want to have better performance, "let g:indentLine_faster = 1"

[luan]

I don't get it, why would I want slower performance?

[Yggdroot]

As you wish.

[ericboehs]

let g:indentLine_faster = 1 didn't seem to help me. :(

[yugaljindle]

Can you explain this fix let g:indentLine_faster = 1 what are we trading for speed with this option ? If nothing then why isn't that default ?

[Yggdroot]

'let g:indentLine_faster = 1' can make the performance better, but indentLine will display on the non leading spaces. In my frequent use, I don't have the performance issue, so I don't let it to be default.

[yugaljindle]

Okay, but for me I loose all my vim speed without this option.

[backward-crazy-mage-puppy-36]

Awesome. vim was almost unusable, took a bit of time to narrow down the fault to indent line plugin. "let g:indentLine_faster = 1" worked like a charm, almost up to normal performance (a very minuscule delay in loading files, nothing that breaks the flow). +1 for making this a default setting. thanks for the plugin & the fix.

[Leandros]

let g:indentLine_faster = 1 seem to work, but it'll remove the leading spaces, is there a way to bring them back?

[syslino]

Yeah, works like a charm. Thanks a lot for this fix!

[drzel]

let g:indentLine_faster = 1 breaks haml syntax highlighting.

[stsewd]

I'm using deoplete for completion, when a preview window appears neovim is very slow, if I disable indentLine or the preview window, everything is normal. Any idea why is so slow when the preview window is present?

[Yggdroot]

Now the IndentLine has been reimplemented in a new way, maybe all the issue has been fixed. Please update it and try again. g:indentLine_faster is of no use now.

[alex-shamshurin]

It's not fixed! It still has totally unacceptable performance! Especially on JSX (html like) syntax. When file is opened first time - it's ok. But when I switch many times windows VIM scrolling become slower and slower each time (and finally cursor lags for 2-3 seconds). It does not happened when I switching between buffers.

[alex-shamshurin]

https://github.com/Yggdroot/indentLine/pull/224

[Seybo]

let g:indentLine_faster = 1 doesn't make any difference for me i have 500 lines file which is lagging a lot on scroll in the places like this