Boost buffer content replace

[mluts]

:substitute hangs my machine for 5-15 seconds on large files, this works much faster

[venantius]

What does this do?

[venantius]

Definitely appreciate the speedup. Would love to understand a bit more about what exactly the changes do since it's been a while since I wrote this. Mind breaking it down a bit more for me?

[mluts]

@venantius :0,substitute/\_.*/\=formatted_output/g works frustratingly slow, perhaps because whole file becomes matched using regexp .*.

%del is actually vim's :[range]delete command (see :help :delete)

setline()

            When {text} is a List then line {lnum} and following lines     
            will be set to the items in the list.  Example:                
                    :call setline(5, ['aaa', 'bbb', 'ccc'])                
            This is equivalent to:                                         
                    :for [n, l] in [[5, 'aaa'], [6, 'bbb'], [7, 'ccc']]    
                    :  call setline(n, l)                                  
                    :endfor

[venantius]

Great, thanks!