Mercurial > hg
diff mercurial/demandimport.py @ 29223:c04ad3d3c651
annotate: optimize line counting
We used len(text.splitlines()) to count lines. This allocates, copies, and
deallocates an object for every line in a file. Instead, we use
count("\n") to count newlines and adjust based on whether there's a
trailing newline.
This improves the speed of annotating localrepo.py from 4.2 to 4.0
seconds.
author | Matt Mackall <mpm@selenic.com> |
---|---|
date | Wed, 18 May 2016 16:37:32 -0500 |
parents | c7f89ad87bae |
children | fcaf20175b1b |