Slow performance on CtrlP , it doesn't work to ignore some folders

Question

I tried to ignore the vendor by adding the following setting in .vimrc and I start my ctrlP by typing ff

map ff :CtrlP<.><cr>

However, it still tried to index all the files under the zeus folder including vendor folder.

But after finishing index, I still can NOT search the files under vendor,

Why does CtrlP take long time to index ?

129 "add ctrlp.vim setting
130 ""
131 set wildignore+=*/tmp/*,*.so,*.swp,*.zip,*/vendor/*,*/\.git/*
132 let g:ctrlp_custom_ignore = 'tmp$\|\.git$\|\.hg$\|\.svn$\|.rvm$|.bundle$\|vendor'
133 let g:ctrlp_working_path_mode = 'ra'
134 let g:ctrlp_match_window_bottom=1
135 let g:ctrlp_max_height=25
136 let g:ctrlp_match_window_reversed=0
137 let g:ctrlp_mruf_max=500
138 let g:ctrlp_follow_symlinks=1
139 let g:ctrlp_clear_cache_on_exit=0

Here is my .vimrc, I thought there might be some settings conflicting each other

hi  Comment  ctermfg=6

"make vim save and load the folding of the document each time it loads"
""also places the cursor in the last place that it was left."
au BufWinLeave *.* mkview
au BufWinEnter *.* silent loadview


"function SetCafeOptions()
    "CoffeeCompile
    ":set nonu
    ":res -24
    ":res +24
"endfunction

set encoding=utf-8 
set fileencoding=utf-8 

colorscheme elflord            
set smartindent
set tabstop=4
set expandtab  
set shiftwidth=4

"make it autoreload
set autoread 

"auto move it last time the position you viewed
"make vim save and load the folding of the document each time it loads"
""also places the cursor in the last place that it was left."

"try to set show ansi color
if &term=="ansi" 
    set t_Co=0 
endif

"set expandtab

filetype on

if has("cscope")
    set csprg=/usr/bin/cscope
    set csto=0
    set cst
    set nocsverb
    " add any database in current directory
    if filereadable("cscope.out")
        cs add cscope.out
        " else add database pointed to by environment
    elseif $CSCOPE_DB != ""
        cs add $CSCOPE_DB
    endif
    set csverb
    set cscopetag
    set cscopequickfix=s-,g-,c-,d-,t-,e-,f-,i-
endif

"let Tlist can close windows at one time
let Tlist_Show_One_File=1
let Tlist_Exit_OnlyWindow=1
let Tlist_Ctags_Cmd = '/usr/local/bin/ctags'

" Key map
" Presee F4 and you can open the NERDTree
nnoremap <silent> <F4> :NERDTree<CR>  
"nnoremap <silent> <F3> :!/usr/bin/env python %<CR>
" Show function List with Tlist 
nnoremap <F12> :TlistToggle<CR>

" Map ctrl+q to ctrlw+ctrlw
"
"nnoremap <silent> <C-q>  :<C-w><C-w>

"switch in splitted window
map <c-d> <c-w>l
map <c-a> <c-w>h

"set highlight
set hlsearch

"set autocomplet 
"autocmd BufNewFile,BufRead *.html.erb set filetype=html.eruby
autocmd BufNewFile,BufRead *.html.erb set filetype=erb.html.eruby
filetype plugin indent on

"auto import python template
autocmd bufnewfile *.py 0r ~/common_lib/python_lib/tmpl.py


map ff :CtrlP<.><cr>
"set NerdTreeSize
let g:NERDTreeWinSize=12
let g:NERDTreeIgnore=['\.vim$', '\~$', '\vendor$']
"auto close the nerdtress window whe you open new file
"let g:ctrlp_dont_split = 'nerdtree'

set nocompatible " explictly get out of vi-compatible mode

set background=dark " we plan to use a dark background

syntax on " syntax highlighting on

set number " turn on line numbers

set ruler "always show current position along the bottom

set incsearch " do highlight as you type you search phrase

set ignorecase " case insensitive by default

set smartcase " if there are caps, go case-sensitive


"Rope vim
"let $PYTHONPATH .= ":~/install/ropehg/rope:~/install/ropehg/ropemode:~/install/ropehg/ropevim"
"source ~/install/ropehg/ropevim/ropevim.vim
"let g:pymode_rope_goto_def_newwin = "new"
"let ropevim_vim_completion=1
"Use Ctrl + ] . to autocomple
inoremap <C-]> <C-R>=RopeCodeAssistInsertMode()<CR>
map <leader>j :RopeGotoDefinition<CR>
map <leader>r :RopeRename<CR>

" Load the whole plugin
 let g:pymode = 1
" Load run code plugin
 let g:pymode_run = 1

"add ctrlp.vim setting
""
set wildignore+=*/tmp/*,*.so,*.swp,*.zip,*/vendor/*,*/\.git/*
let g:ctrlp_custom_ignore = 'tmp$\|\.git$\|\.hg$\|\.svn$\|.rvm$|.bundle$\|vendor'
let g:ctrlp_working_path_mode = 0
let g:ctrlp_match_window_bottom=1
let g:ctrlp_max_height=25
let g:ctrlp_match_window_reversed=0
let g:ctrlp_mruf_max=500
let g:ctrlp_follow_symlinks=1
let g:ctrlp_clear_cache_on_exit=0


"Vundle
 set rtp+=~/.vim/bundle/vundle/
 call vundle#rc()
 Bundle 'gmarik/vundle'
 Bundle 'tpope/vim-surround'
 Bundle 'Raimondi/delimitMate'
"coffee script"
 Bundle 'kchmck/vim-coffee-script'
 Bundle 'ack.vim'
 Bundle 'matchit.zip'
 Bundle 'kien/ctrlp.vim'
 "Markdown"
 "Bundle 'plasticboy/vim-markdown'
 ""Vim-scripts repo
 "Bundle 'The-NERD-Commenter'
 Bundle 'pep8'
 ""Bundle 'AutoClose'
 Bundle 'desert-warm-256'
 Bundle 'https://github.com/altercation/vim-colors-solarized.git'
 filetype plugin indent on

 nmap <leader>a <Esc>:Ack ""

 "folding code
 nnoremap <space> za
 vnoremap <space> zf

" pep8
let g:pep8_map='<leader>8'

"coffee script"
call pathogen#infect()



let Tlist_Use_Right_Window   = 1

"autocmd BufEnter * if &filetype == "" | setlocal ft=python | endif

"markdown https://github.com/plasticboy/vim-markdown/wiki"
"let g:vim_markdown_folding_disabled=1

"auto exec ruby and coffee script with F5 , remeber to save file before launching
autocmd FileType python map <leader>p :!python %<cr>
autocmd FileType ruby,rb map <leader>5 :w!<cr>:!ruby %<cr>
autocmd FileType * map <leader>e :qa!<cr>

"set extension .god as a Ruby file"
"au BufNewFile,BufRead *.god set filetype=ruby

"autocmd FileType coffee nmap <F5> :CoffeeCompile<cr>
"autocmd FileType coffee map <F5> :call SetCafeOptions()<cr>

"so ~/.vim/snippets/support_functions.vim

set re=1

autocmd Filetype gitcommit setlocal spell textwidth=72


 " enable per-project .vimrc files
   set exrc
 "   " Only execute safe per-project vimrc commands
     set secure"

Answer 1

Here are a few tips that should definitely speed up ctrlp :

let g:ctrlp_cache_dir = $HOME . '/.cache/ctrlp'
if executable('ag')
  let g:ctrlp_user_command = 'ag %s -l --nocolor -g ""'
endif

In the above example, the first option tells ctrlp to persist the cache in the configured location, so when you launch vim again, it will read from there and load the cache (much faster).

The second option configures ctrlp to use ag (the_silver_searcher) instead of vim's native globpath() apis to search for files, this will drastically improve it's scanning speed, if you don't want to use ag, you can even use plain old grep and it still should be significantly faster. Check :h 'g:ctrlp_user_command' for more details.