Slow performance / update delay

[kenny1847]

Got very big python file (16k LOC) so opening is extremely slow w/ tagbar.

$ vim --startuptime profile.log very_big_file.py
$ cat profile.log

times in msec
 clock   self+sourced   self:  sourced script
 clock   elapsed:              other lines

000.006  000.006: --- VIM STARTING ---
000.079  000.073: Allocated generic buffers
000.148  000.069: locale set
000.157  000.009: GUI prepared
000.160  000.003: clipboard setup
000.163  000.003: window checked
000.507  000.344: inits 1
000.563  000.056: parsing arguments
000.565  000.002: expanding arguments
000.577  000.012: shell init
000.786  000.209: Termcap init
000.820  000.034: inits 2
000.960  000.140: init highlight
003.661  002.458  002.458: sourcing /home/kenny1847/.vim/colors/solarized.vim
005.630  001.468  001.468: sourcing /home/kenny1847/.vim/autoload/plug.vim
014.817  000.015  000.015: sourcing /home/kenny1847/.vim/plugged/vim-fugitive/ftdetect/fugitive.vim
014.922  000.018  000.018: sourcing /home/kenny1847/.vim/plugged/ultisnips/ftdetect/snippets.vim
015.022  005.691  005.658: sourcing /usr/local/share/vim/vim80/filetype.vim
015.220  000.036  000.036: sourcing /usr/local/share/vim/vim80/ftplugin.vim
015.430  000.032  000.032: sourcing /usr/local/share/vim/vim80/indent.vim
017.168  000.771  000.771: sourcing /usr/local/share/vim/vim80/syntax/syncolor.vim
017.626  000.180  000.180: sourcing /usr/local/share/vim/vim80/syntax/syncolor.vim
019.352  003.668  002.717: sourcing /home/kenny1847/.vim/colors/solarized.vim
020.001  004.354  000.686: sourcing /usr/local/share/vim/vim80/syntax/synload.vim
020.026  004.548  000.194: sourcing /usr/local/share/vim/vim80/syntax/syntax.vim
020.250  000.155  000.155: sourcing /home/kenny1847/.vim/plugged/CamelCaseMotion/autoload/camelcasemotion.vim
020.762  019.696  005.308: sourcing $HOME/.vimrc
021.130  000.202  000.202: sourcing .vimrc
021.133  000.275: sourcing vimrc file(s)
022.100  000.855  000.855: sourcing /home/kenny1847/.vim/plugged/a.vim/plugin/a.vim
022.299  000.141  000.141: sourcing /home/kenny1847/.vim/plugged/ack.vim/plugin/ack.vim
022.744  000.398  000.398: sourcing /home/kenny1847/.vim/plugged/CamelCaseMotion/plugin/camelcasemotion.vim
023.339  000.548  000.548: sourcing /home/kenny1847/.vim/plugged/fzf/plugin/fzf.vim
024.121  000.726  000.726: sourcing /home/kenny1847/.vim/plugged/fzf.vim/plugin/fzf.vim
024.223  000.053  000.053: sourcing /home/kenny1847/.vim/plugged/jedi-vim/plugin/jedi.vim
024.729  000.152  000.152: sourcing /home/kenny1847/.vim/plugged/nerdtree/autoload/nerdtree.vim
025.567  000.353  000.353: sourcing /home/kenny1847/.vim/plugged/nerdtree/lib/nerdtree/path.vim
025.701  000.084  000.084: sourcing /home/kenny1847/.vim/plugged/nerdtree/lib/nerdtree/menu_controller.vim
025.797  000.051  000.051: sourcing /home/kenny1847/.vim/plugged/nerdtree/lib/nerdtree/menu_item.vim
025.918  000.077  000.077: sourcing /home/kenny1847/.vim/plugged/nerdtree/lib/nerdtree/key_map.vim
026.133  000.159  000.159: sourcing /home/kenny1847/.vim/plugged/nerdtree/lib/nerdtree/bookmark.vim
026.340  000.161  000.161: sourcing /home/kenny1847/.vim/plugged/nerdtree/lib/nerdtree/tree_file_node.vim
026.718  000.332  000.332: sourcing /home/kenny1847/.vim/plugged/nerdtree/lib/nerdtree/tree_dir_node.vim
026.946  000.173  000.173: sourcing /home/kenny1847/.vim/plugged/nerdtree/lib/nerdtree/opener.vim
027.156  000.168  000.168: sourcing /home/kenny1847/.vim/plugged/nerdtree/lib/nerdtree/creator.vim
027.261  000.062  000.062: sourcing /home/kenny1847/.vim/plugged/nerdtree/lib/nerdtree/flag_set.vim
027.451  000.138  000.138: sourcing /home/kenny1847/.vim/plugged/nerdtree/lib/nerdtree/nerdtree.vim
027.716  000.225  000.225: sourcing /home/kenny1847/.vim/plugged/nerdtree/lib/nerdtree/ui.vim
027.779  000.021  000.021: sourcing /home/kenny1847/.vim/plugged/nerdtree/lib/nerdtree/event.vim
027.855  000.035  000.035: sourcing /home/kenny1847/.vim/plugged/nerdtree/lib/nerdtree/notifier.vim
028.199  000.295  000.295: sourcing /home/kenny1847/.vim/plugged/nerdtree/autoload/nerdtree/ui_glue.vim
029.902  000.082  000.082: sourcing /home/kenny1847/.vim/plugged/nerdtree/nerdtree_plugin/exec_menuitem.vim
030.312  000.398  000.398: sourcing /home/kenny1847/.vim/plugged/nerdtree/nerdtree_plugin/fs_menu.vim
030.581  006.315  003.349: sourcing /home/kenny1847/.vim/plugged/nerdtree/plugin/NERD_tree.vim
030.738  000.044  000.044: sourcing /home/kenny1847/.vim/plugged/neocomplete.vim/plugin/neocomplete/buffer.vim
030.785  000.036  000.036: sourcing /home/kenny1847/.vim/plugged/neocomplete.vim/plugin/neocomplete/dictionary.vim
030.832  000.037  000.037: sourcing /home/kenny1847/.vim/plugged/neocomplete.vim/plugin/neocomplete/member.vim
030.875  000.032  000.032: sourcing /home/kenny1847/.vim/plugged/neocomplete.vim/plugin/neocomplete/tag.vim
030.962  000.077  000.077: sourcing /home/kenny1847/.vim/plugged/neocomplete.vim/plugin/neocomplete.vim
031.142  000.011  000.011: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/autoloclist.vim
031.161  000.009  000.009: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/balloons.vim
031.177  000.007  000.007: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/checker.vim
031.193  000.007  000.007: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/cursor.vim
031.209  000.007  000.007: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/highlighting.vim
031.225  000.007  000.007: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/loclist.vim
031.241  000.007  000.007: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/modemap.vim
031.257  000.007  000.007: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/notifiers.vim
031.273  000.008  000.008: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/registry.vim
031.291  000.009  000.009: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/signs.vim
031.774  000.336  000.336: sourcing /home/kenny1847/.vim/plugged/syntastic/autoload/syntastic/util.vim
035.862  000.042  000.042: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/autoloclist.vim
035.913  000.038  000.038: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/balloons.vim
036.050  000.127  000.127: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/checker.vim
036.123  000.063  000.063: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/cursor.vim
036.187  000.054  000.054: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/highlighting.vim
036.393  000.196  000.196: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/loclist.vim
036.463  000.059  000.059: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/modemap.vim
036.520  000.047  000.047: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/notifiers.vim
036.896  000.366  000.366: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/registry.vim
037.073  000.162  000.162: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic/signs.vim
038.063  006.762  005.272: sourcing /home/kenny1847/.vim/plugged/syntastic/plugin/syntastic.vim
038.948  000.835  000.835: sourcing /home/kenny1847/.vim/plugged/vim-abolish/plugin/abolish.vim
039.325  000.108  000.108: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/init.vim
039.834  000.264  000.264: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/parts.vim
040.452  001.464  001.092: sourcing /home/kenny1847/.vim/plugged/vim-airline/plugin/airline.vim
040.512  000.014  000.014: sourcing /home/kenny1847/.vim/plugged/vim-airline-themes/plugin/airline-themes.vim
041.134  000.582  000.582: sourcing /home/kenny1847/.vim/plugged/vim-better-whitespace/plugin/better-whitespace.vim
041.373  000.083  000.083: sourcing /home/kenny1847/.vim/plugged/vim-operator-user/autoload/operator/user.vim
041.559  000.380  000.297: sourcing /home/kenny1847/.vim/plugged/vim-clang-format/plugin/clang_format.vim
041.744  000.142  000.142: sourcing /home/kenny1847/.vim/plugged/vim-commentary/plugin/commentary.vim
042.906  001.108  001.108: sourcing /home/kenny1847/.vim/plugged/vim-dispatch/plugin/dispatch.vim
046.678  003.726  003.726: sourcing /home/kenny1847/.vim/plugged/vim-easymotion/plugin/EasyMotion.vim
046.917  000.166  000.166: sourcing /home/kenny1847/.vim/plugged/vim-fugitive/plugin/fugitive.vim
061.191  014.183  014.183: sourcing /home/kenny1847/.vim/plugged/vim-rtags/plugin/rtags.vim
061.699  000.438  000.438: sourcing /home/kenny1847/.vim/plugged/vim-surround/plugin/surround.vim
063.680  001.931  001.931: sourcing /home/kenny1847/.vim/plugged/vim-unimpaired/plugin/unimpaired.vim
063.835  000.072  000.072: sourcing /home/kenny1847/.vim/plugged/vimproc.vim/plugin/vimproc.vim
064.636  000.743  000.743: sourcing /home/kenny1847/.vim/plugged/tagbar/plugin/tagbar.vim
064.979  000.055  000.055: sourcing /home/kenny1847/.vim/plugged/ultisnips/autoload/UltiSnips/map_keys.vim
065.056  000.363  000.308: sourcing /home/kenny1847/.vim/plugged/ultisnips/plugin/UltiSnips.vim
065.272  000.050  000.050: sourcing /usr/local/share/vim/vim80/plugin/getscriptPlugin.vim
065.427  000.142  000.142: sourcing /usr/local/share/vim/vim80/plugin/gzip.vim
065.617  000.176  000.176: sourcing /usr/local/share/vim/vim80/plugin/logiPat.vim
065.660  000.023  000.023: sourcing /usr/local/share/vim/vim80/plugin/manpager.vim
065.798  000.126  000.126: sourcing /usr/local/share/vim/vim80/plugin/matchparen.vim
066.253  000.434  000.434: sourcing /usr/local/share/vim/vim80/plugin/netrwPlugin.vim
066.309  000.032  000.032: sourcing /usr/local/share/vim/vim80/plugin/rrhelper.vim
066.348  000.021  000.021: sourcing /usr/local/share/vim/vim80/plugin/spellfile.vim
066.481  000.118  000.118: sourcing /usr/local/share/vim/vim80/plugin/tarPlugin.vim
066.565  000.068  000.068: sourcing /usr/local/share/vim/vim80/plugin/tohtml.vim
066.723  000.143  000.143: sourcing /usr/local/share/vim/vim80/plugin/vimballPlugin.vim
066.884  000.133  000.133: sourcing /usr/local/share/vim/vim80/plugin/zipPlugin.vim
066.900  002.051: loading plugins
066.939  000.039: loading packages
067.108  000.090  000.090: sourcing /home/kenny1847/.vim/plugged/ultisnips/after/plugin/UltiSnips_after.vim
067.119  000.090: loading after plugins
067.619  000.500: inits 3
067.858  000.239: reading viminfo
069.006  001.148: setup clipboard
069.026  000.020: setting raw mode
069.029  000.003: start termcap
069.055  000.026: clearing screen
078.570  000.033  000.033: sourcing /home/kenny1847/.vim/plugged/yapf/plugins/vim/plugin/yapf.vim
154.409  075.466  075.466: sourcing /home/kenny1847/.vim/plugged/jedi-vim/autoload/jedi.vim
154.463  075.574  000.108: sourcing /home/kenny1847/.vim/plugged/jedi-vim/ftplugin/python/jedi.vim
155.372  000.495  000.495: sourcing /usr/local/share/vim/vim80/ftplugin/python.vim
155.609  000.030  000.030: sourcing /home/kenny1847/.vim/plugged/jedi-vim/after/ftplugin/python/jedi.vim
155.963  000.111  000.111: sourcing /usr/local/share/vim/vim80/indent/python.vim
156.215  000.048  000.048: sourcing /home/kenny1847/.vim/plugged/jedi-vim/ftplugin/python/jedi.vim
156.584  000.010  000.010: sourcing /usr/local/share/vim/vim80/ftplugin/python.vim
156.782  000.020  000.020: sourcing /home/kenny1847/.vim/plugged/jedi-vim/after/ftplugin/python/jedi.vim
156.999  000.023  000.023: sourcing /usr/local/share/vim/vim80/indent/python.vim
157.799  000.457  000.457: sourcing /usr/local/share/vim/vim80/syntax/python.vim
157.936  000.083  000.083: sourcing /home/kenny1847/.vim/plugged/jedi-vim/after/syntax/python.vim
158.293  000.180  000.180: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions.vim
158.429  000.043  000.043: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/quickfix.vim
158.602  000.102  000.102: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline.vim
158.737  000.027  000.027: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/netrw.vim
158.847  000.018  000.018: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/term.vim
159.022  000.046  000.046: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/tagbar.vim
159.210  000.079  000.079: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/util.vim
159.449  000.162  000.162: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/branch.vim
159.638  000.042  000.042: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/fugitiveline.vim
159.795  000.038  000.038: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/syntastic.vim
160.005  000.094  000.094: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/whitespace.vim
160.311  000.032  000.032: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/po.vim
160.447  000.035  000.035: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/wordcount.vim
160.656  000.110  000.110: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/tabline.vim
160.790  000.039  000.039: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/tabline/autoshow.vim
161.084  000.073  000.073: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/tabline/tabs.vim
161.325  000.127  000.127: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/tabline/buffers.vim
161.516  000.023  000.023: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/keymap.vim
163.307  000.055  000.055: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/section.vim
163.607  000.144  000.144: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/highlighter.vim
165.574  000.047  000.047: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/themes.vim
165.788  000.541  000.494: sourcing /home/kenny1847/.vim/plugged/vim-airline-themes/autoload/airline/themes/solarized.vim
173.530  000.124  000.124: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/builder.vim
173.827  000.063  000.063: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/default.vim
193.889  002.356  002.356: sourcing /home/kenny1847/.vim/plugged/vim-fugitive/autoload/fugitive.vim
195.022  000.150  000.150: sourcing /home/kenny1847/.vim/plugged/syntastic/autoload/syntastic/log.vim
195.264  044.622: opening buffers
196.005  000.741: BufEnter autocommands
196.007  000.002: editing files in windows
203.140  007.133: VimEnter autocommands
203.142  000.002: before starting main loop
203.595  000.088  000.088: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/tabline/ctrlspace.vim
203.944  000.112  000.112: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/tabline/builder.vim
206.737  000.047  000.047: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/tabline/buflist.vim
206.941  000.051  000.051: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/extensions/tabline/formatters/default.vim
215.042  000.133  000.133: sourcing /home/kenny1847/.vim/plugged/vim-airline/autoload/airline/async.vim
218.082  001.675  001.675: sourcing /home/kenny1847/.vim/plugged/tagbar/autoload/tagbar.vim
218.345  000.060  000.060: sourcing /home/kenny1847/.vim/plugged/tagbar/autoload/tagbar/debug.vim
227.258  000.297  000.297: sourcing /home/kenny1847/.vim/plugged/tagbar/autoload/tagbar/types/ctags.vim
227.453  000.032  000.032: sourcing /home/kenny1847/.vim/plugged/tagbar/autoload/tagbar/prototypes/typeinfo.vim
232.154  000.084  000.084: sourcing /home/kenny1847/.vim/plugged/tagbar/autoload/tagbar/prototypes/fileinfo.vim
288.186  000.147  000.147: sourcing /home/kenny1847/.vim/plugged/tagbar/autoload/tagbar/prototypes/normaltag.vim
288.461  000.125  000.125: sourcing /home/kenny1847/.vim/plugged/tagbar/autoload/tagbar/prototypes/basetag.vim
48025.746  000.059  000.059: sourcing /home/kenny1847/.vim/plugged/tagbar/autoload/tagbar/prototypes/kindheadertag.vim
48053.646  000.069  000.069: sourcing /home/kenny1847/.vim/plugged/tagbar/autoload/tagbar/sorting.vim
48200.799  000.055  000.055: sourcing /home/kenny1847/.vim/plugged/tagbar/autoload/tagbar/state.vim
48245.088  48038.912: first screen update
48245.089  000.001: --- VIM STARTED ---

[starifly]

same problem, when open big Makefile(about 9m), scroll becomes very slowly

[narcolepsy]

Am seeing this problem on some verilog files (using verilog_systemverilog syntax plugin) - file size only 800kB

[alerque]

@kenny1847, @starifly, and @narcolepsy — what you you have vim's updatetime value configured? Try :set updatetime to view the value, and set it to something lower if you want faster refreshes.

I'm guessing there is a better way to do this overall using an autocommand hook so I"m going to leave this issue open to look into that, but I suspect for most of you having a too-big updatetime value is your only issue. Please feel free to comment here on whether or not that addresses your issue.

[alerque]

At the very least to fix this issue it should be documented how this value affects the plugin's apparent performance because it seems like a lot of people deal with this.

[narcolepsy]

updatetime=4000

[alerque]

@narcolepsy With that setting tagbar will not even start updating until 4 seconds have passed since the last cursor activity.

[alerque]

The startup time issue is a duplicate of #477 — we shouldn't be doing a tags run that blocks the main thread when first opening files until some tagbar view is requested or we can run it in the background. Period.

The update delay is a different issue that the startup time one, but I believe that would be resolved by a smaller updatetime value.

@starifly Scrolling is a different issue and shouldn't even be a function of this plugin at all. If you still have that issue please open it as a separate issue.