tree 3c64d83736a7793c17b116f22b1c8342b89f447d
parent 9bad3dea80a64143e0354b4d06ce535b3945d801
author Natalie Weizenbaum <nweiz@google.com> 1448923989 -0800
committer Natalie Weizenbaum <nweiz@google.com> 1448923989 -0800

Cache the current working directory.

Recomputing this isn't terribly expensive, but it happens a lot so it's
nice to avoid.

Also avoid calling it in relative() when the path is already relative.

This brings current from about 0.070 iterations/us to about 0.097, and relative from about 0.080 to about 1.589.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1473563003 .