Droggl asked how to disable vim-gutter when viewing log files because of slowness. I've come up with the following solution which seems like it should work.
Assuming your log files end in *.log, add the following to your ~/.vimrc.
autocmd BufNewFile,BufReadPost *.log setlocal filetype=log filetype plugin onThen make an entry like so in ~/.vim/ftplugin/log.vim
:GitGutterDisableHope that helps!