Note the performance enhancement in sk_free

This mainly affected armv7 devices with some larger
regressions around 15%. The other platforms where much smaller
at around 3%.

Change-Id: Iee9ac7b2f707035f45cdc581fc45a265c7ecf16d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/588578
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
1 file changed