map <F5> :call CompileRun()<CR>
imap <F5> <Esc>:call CompileRun()<CR>

func! CompileRun()
exec "w"
if &filetype == 'c'
    exec "!gcc % -o %<"
    exec "!time ./%<"
elseif &filetype == 'cpp'
    exec "!g++ % -o %<"
    exec "!time ./%<"
elseif &filetype == 'java'
    exec "!javac %"
    exec "!time java -cp %:p:h %t:r"
elseif &filetype == 'sh'
    exec "!time bash %"
elseif &filetype == 'python'
    exec "!time python %"
elseif &filetype == 'html'
    exec "!google-chrome % &"
elseif &filetype == 'go'
    exec "!go build %<"
    exec "!time go run %"
elseif &filetype == 'matlab'
    exec "!time octave %"
endif
endfunc