Re: speed up looping through all buffers

On Sunday, June 10, 2012 9:35:16 AM UTC+12, Alexandru Munteanu wrote:
> What seems to take a lot of time (even on just 50 files) is the second
> line (the buffer switch 'b!' command).
> Any idea how I could improve the performance ?

The buffer switch is loading the next buffer, and maybe processing autocommands for the buffer.

If you are going to be processing the same files repeatedly, :set hidden will load them only the first time.

Using :bufdo always suppresses syntax autocommands, and is a clean way to loop through the buffers. For example, in the vim source directory, vim *.c finds 101 files, and sourcing the following completes in 3 s:

let s_search = 'phi'
let g:results = []
bufdo exe 'normal gg' |
\ while search(s_search,'',40000) > 0 |
\ let g:results += [getline(".")] |
\ endwhile

If I've :set hidden, subsequent runs are very quick. In principle, opening the files read only (vim -R) should be quicker, but I didn't notice a difference.

If you don't want to use bufdo, you can invoke stuff prefixed with :noautocmd.

Regards, John Little

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