slow start in neovim

[meijieru]

• vim or neovim?
  • vim
  • neovim
• vim --version or nvim --version:

NVIM v0.2.2
Build type: Release
LuaJIT 2.0.5
Compilation: /usr/bin/cc -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong -fno-plt -Wconversion -DNVIM_MSGPACK_HAS_FLOAT32 -DNVIM_UNIBI_HAS_VAR_FROM -O2 -DNDEBUG -DMIN_LOG_LEVEL=3 -Wall -Wextra -pedantic -Wno-unused-parameter -Wstrict-prototypes -std=gnu99 -Wimplicit-fallthrough -Wvla -fstack-protector-strong -fdiagnostics-color=auto -DINCLUDE_GENERATED_DECLARATIONS -D_GNU_SOURCE -I/build/neovim/src/build/config -I/build/neovim/src/neovim-0.2.2/src -I/usr/include -I/usr/include -I/usr/include -I/usr/include -I/usr/include -I/usr/include -I/usr/include -I/build/neovim/src/build/src/nvim/auto -I/build/neovim/src/build/include
Compiled by builduser

Features: +acl +iconv +jemalloc +tui 
See ":help feature-compile"

   system vimrc file: "$VIM/sysinit.vim"
  fall-back for $VIM: "/usr/share/nvim"

Run :checkhealth for more info

• Output of :echo has("python"): 1
• Output of :echo has("python3"): 1
• Output of :echo &pythondll(only vim, not neovim):
• Output of :echo &pythonthreedll(only vim, not neovim):
• Output of :py print(sys.version):
• Output of :py3 print(sys.version): 3.6.5 (default, May 11 2018, 04:00:52) [GCC 8.1.0]
• Operating system:
  • Linux
  • Mac OS X
  • Windows
  • Etc.
• Configurations related to LeaderF in vimrc:

    " LeaderF
    let g:Lf_ShortcutF = '<leader>ff'
    let g:Lf_ShortcutB = '<leader>fb'
    nnoremap <leader>fm :LeaderfMru<cr>
    nnoremap <leader>fc :LeaderfFunction!<cr>
    nnoremap <leader>fl :LeaderfBufTag!<cr>
    nnoremap <leader>ft :LeaderfTag<cr>

    let g:Lf_RootMarkers = g:root_markers
    let g:Lf_WorkingDirectoryMode = 'Ac'
    let g:Lf_WindowHeight = 0.35
    let g:Lf_CacheDirectory = g:runtime_root . 'cache'
    let g:Lf_ShowRelativePath = 1
    let g:Lf_StlColorscheme = 'default'
    let g:Lf_StlSeparator = { 'left': '', 'right': '' }
    let g:Lf_MruMaxFiles = 2048
    let g:Lf_StlColorscheme = 'gruvbox'
    let g:Lf_PreviewResult = {'Function':1, 'BufTag':0}
    let g:Lf_NormalMap = {
                \ 'File':   [['<ESC>', ':exec g:Lf_py "fileExplManager.quit()"<CR>']],
                \ 'Buffer': [['<ESC>', ':exec g:Lf_py "bufExplManager.quit()"<CR>']],
                \ 'Mru':    [['<ESC>', ':exec g:Lf_py "mruExplManager.quit()"<CR>']],
                \ 'Tag':    [['<ESC>', ':exec g:Lf_py "tagExplManager.quit()"<CR>']],
                \ 'Function':    [['<ESC>', ':exec g:Lf_py "functionExplManager.quit()"<CR>']],
                \ "BufTag":    [["<ESC>", ':exec g:Lf_py "bufTagExplManager.quit()"<CR>']],
                \ 'Colorscheme':    [['<ESC>', ':exec g:Lf_py "colorschemeExplManager.quit()"<CR>']],
                \ }

Describe your question, feature request, or bug.

In neovim, startup takes around 140ms, while in vim only around 40ms.
Any way to speedup the startup process?

[Yggdroot]

Firstly, you don't have to set let g:Lf_NormalMap=... now, <esc> has the behavior by default.

Currently, I don't know how to speed up the startup.

PYTHON PROVIDER CONFIGURATION
                                                 g:python_host_prog
                                                 g:python3_host_prog
 Program to use for evaluating Python code. Setting this makes startup faster.
 Also useful for working with virtualenvs.
     let g:python_host_prog  = '/path/to/python'
     let g:python3_host_prog = '/path/to/python3'

This may help.

[meijieru]

I have set these values to speedup pythonx.vim

[Yggdroot]

Fixed.
How did you draw the picture of startup time?

[meijieru]

By profiler

[Yggdroot]

Thanks. Could you confirm whether the fix can reduce the startup time please?

[meijieru]

Yeah, the startup time reduce significantly.
Thanks