vim - 为什么 Vim 这么慢？

Question

我是一个 vim 初学者，我有点困惑。看起来 Vim 比 Geany 慢。这是一个非常明显的区别。当我在 Geany 中按住任何键时，它会毫无延迟地打印它(例如 llllllll)。在 Vim 中，它缓慢而跳跃。与 Geany 相比，vim 中的自动完成是可怕的。我认为 Vim 和光一样快。看起来不是。有什么建议可以改变这种情况，让 vim 更快吗？

这是我的 _vimrc 文件:

" This must be first, because it changes other options as side effect
set nocompatible

" Use pathogen to easily modify the runtime path to include all
" plugins under the ~/.vim/bundle directory
call pathogen#helptags()
call pathogen#infect()

" change the mapleader from \ to ,
let mapleader=","

" Quickly edit/reload the vimrc file
nmap <silent> <leader>ev :e $MYVIMRC<CR>
nmap <silent> <leader>sv :so $MYVIMRC<CR>

set hidden
set nowrap        " don't wrap lines
set tabstop=4     " a tab is four spaces
set backspace=indent,eol,start
                " allow backspacing over everything in insert mode
set autoindent    " always set autoindenting on
set copyindent    " copy the previous indentation on autoindenting
set number        " always show line numbers
set shiftwidth=4  " number of spaces to use for autoindenting
set shiftround    " use multiple of shiftwidth when indenting with '<' and '>'
set showmatch     " set show matching parenthesis
set ignorecase    " ignore case when searching
set smartcase     " ignore case if search pattern is all lowercase,
                "    case-sensitive otherwise
set smarttab      " insert tabs on the start of a line according to
                "    shiftwidth, not tabstop
set hlsearch      " highlight search terms
set incsearch     " show search matches as you type

set history=1000         " remember more commands and search history
set undolevels=1000      " use many muchos levels of undo
set wildignore=*.swp,*.bak,*.pyc,*.class
set title                " change the terminal's title
set visualbell           " don't beep
set noerrorbells         " don't beep

set nobackup
set noswapfile

filetype plugin indent on

autocmd filetype python set expandtab

if &t_Co >= 256 || has("gui_running")
    colorscheme badwolf
endif

if &t_Co > 2 || has("gui_running")
    " switch syntax highlighting on, when the terminal has colors
    syntax on
endif

" Vim can highlight whitespaces for you in a convenient way:
set list
set listchars=tab:>.,trail:.,extends:#,nbsp:.

set pastetoggle=<F2>

set mouse=a " Enable mouse

set encoding=utf-8
set langmenu=en_US
let $LANG = 'en_US'
source $VIMRUNTIME/delmenu.vim
source $VIMRUNTIME/menu.vim

set autochdir " working directory is always the same as the file you are       editing 
noremap <F5> :w !python %<CR>
inoremap <F5> <ESC>:w !python %<CR>

nmap <leader>t :NERDTree<CR>
autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTreeType") &&     b:NERDTreeType == "primary") | q | endif

set guifont=Hack:h10:cDEFAULT
let g:Powerline_symbols = 'fancy'
set laststatus=2

python from powerline.vim import setup as powerline_setup
python powerline_setup()
python del powerline_setup

filetype plugin on
set omnifunc=syntaxcomplete#Complete
au CompleteDone * pclose
set completeopt=longest,menuone,preview

set guioptions-=T
set nofoldenable    " disable folding

nmap <silent> ,/ :nohlsearch<CR>

Answer 1

这可能是很多事情，不一定是 Vim 的错。实际上，这不太可能是 vim 的错。

首先，感受一下 Vim 的速度:运行 vim -u NONE并注释掉 .vimrc 中的所有内容 - 然后做一件看起来很慢的事情。

在没有 -u NONE 的情况下运行并进行比较。它应该一样快，否则某些插件会自动加载并导致问题。如果是这样，请尝试暂时将文件移离 ~/.vim/bundle目录。

接下来，取消注释一半的 .vimrc 并检查它是否导致缓慢。继续注释/取消注释，直到找到确切的行。

谷歌导致缓慢的线路并找出是否有替代方案。

我猜你可能会在每次滚动时执行昂贵的操作，例如检查文件语法。

最好一步一步地追捕缓慢。

另一个问题可能是终端和/或驱动程序缓慢(因此将 Vim 与 GVim 进行比较)。如果你有一个带有花哨字体、透明度、小字体和大屏幕的慢速终端，终端可能会非常、非常、非常慢。