perf: use lightline instead of airline to improve performance

init.vim

@@ -19,8 +19,7 @@ Plug 'neoclide/coc.nvim', {'branch': 'release'}
 Plug 'tpope/vim-commentary'
 Plug 'tpope/vim-fugitive'
 Plug 'tpope/vim-surround'
-Plug 'vim-airline/vim-airline'
-Plug 'vim-airline/vim-airline-themes'
+Plug 'itchyny/lightline.vim'
 Plug 'terryma/vim-multiple-cursors'
 Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
 Plug 'junegunn/fzf.vim'
@@ -102,8 +101,15 @@ set nofoldenable
 let javaScript_fold=1
 set hlsearch
 set incsearch
-set ttimeoutlen=0
-
-let g:airline_extensions = ['branch','term', 'tabline']
-let g:airline_powerline_fonts = 1
-let g:airline#extensions#tabline#show_splits = 0
+set ttimeoutlen=10
+
+let g:lightline = {
+      \ 'colorscheme': 'wombat',
+      \ 'active': {
+      \   'left': [ [ 'mode', 'paste' ],
+      \             [ 'gitbranch', 'readonly', 'filename', 'modified' ] ]
+      \ },
+      \ 'component_function': {
+      \   'gitbranch': 'FugitiveHead'
+      \ },
+      \ }