reduce overhead of littleRound

littleRound is used to round widths before a comparison with
maxWidth. The rounding only matters on a very small interval around
maxWidth. Take advantage of this fact to only do the expensive
rounding when close to maxWidth.

This is a 2-3% improvement.

Change-Id: If5b18ed4be56c1c8fa80b97d49930145d0f09b20
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/386844
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Julia Lavrova <jlavrova@google.com>
1 file changed