VIM + Syntastic: how to disable the checker?
I have disabled Syntastic by default and activate/disable error checking with the following in my .vimrc:
let g:syntastic_mode_map = { 'mode': 'passive', 'active_filetypes': [],'passive_filetypes': [] }
nnoremap <C-w>E :SyntasticCheck<CR>
When I need to use error checking I simply hit: ctrl-w E
Using :SyntasticToggleMode
you can toggle Syntastic into passive mode, which will disable auto-checking. You can then check a file by running :SyntasticCheck
instead.
For more, see :help syntastic-commands
On another note: if Syntastic is slow for you consider trying ale as an alternative. Unlike Syntastic it runs asynchronously, so even if it's slow it shouldn't hinder you.