performance update for git branch status in vimrc

vim/.vimrc

@@ -1,22 +1,29 @@
-set runtimepath^=~/.vim/bundle/ctrlp.vim
+"set runtimepath^=~/.vim/bundle/ctrlp.vim
-set runtimepath^=~/.vim/bundle/nerdtree
+""set runtimepath^=~/.vim/bundle/nerdtree
 set nocompatible
-set relativenumber
 syntax on
 filetype plugin on
 set tabstop=4 shiftwidth=4 expandtab
 set number
 set hlsearch
+"set relativenumber
+
+""folding
+set foldenable foldlevelstart=20 foldmethod=indent
 
 " finding files
  set path+=**
  set wildmenu
 
-" tags
+" " tags
  command! MakeTags !ctags -R .
-
+"
 " linter
 autocmd FileType python setlocal makeprg=pylint\ --output-format=parseable
+autocmd FileType yaml   setlocal ts=2 sts=2 sw=2 makeprg=yamllint\ --f\
+parsable\ %
+autocmd FileType json   autocmd BufWritePre <buffer> %!python -m json.tool
+2>/dev/null
 autocmd BufWritePost *.py silent make! <afile> | silent redraw!
 autocmd QuickFixCmdPost [^l]* cwindow
 
@@ -33,19 +40,25 @@ set cursorline
 hi CursorLine  cterm=NONE ctermbg=darkgrey ctermfg=white
 
 " statusline
-function! GitBranch()
+let g:gitparsedbranchname = ' '
-  return system("git rev-parse --abbrev-ref HEAD 2>/dev/null | tr -d '\n'")
+function! UpdateGitBranch()
+  let l:branchname = system("git rev-parse --abbrev-ref HEAD 2>/dev/null | tr -d '\n'")
+  let g:branchstatus = strlen(l:branchname) >  0?'  '.l:branchname.' ':''
 endfunction
 
-function! StatuslineGit()
+augroup UPDATE_GITBRANCH
-  let l:branchname = GitBranch()
+" clear old commands
-  return strlen(l:branchname) > 0?'  '.l:branchname.' ':''
+autocmd!
-endfunction
+" update git branch
+autocmd BufWritePre * :call UpdateGitBranch()
+autocmd BufReadPost * :call UpdateGitBranch()
+autocmd BufEnter * :call UpdateGitBranch()
+augroup END
 
 set laststatus=2
 set statusline=
 set statusline+=%#PmenuSel#
-set statusline+=%{StatuslineGit()}
+set statusline+=%{g:branchstatus}
 set statusline+=%#BufTabLineCurrent#
 set statusline+=\ %M
 set statusline+=\ %r
@@ -60,12 +73,14 @@ set statusline+=\ %p%%
 set statusline+=\ [%n]
 
 
-"map <C-n> :NERDTreeToggle<CR>
+" Tree of files
 map <C-n>  :Lex <bar> vertical resize 30 <CR>
 
-let g:vimspector_enable_mappings = 'HUMAN'
+"let g:vimspector_enable_mappings = 'HUMAN'
-packadd! vimspector
+"packadd! vimspector
 
 "packadd! gruvbox
 colorscheme gruvbox
 set bg=dark
+
+