Avoid recursion for (most) stroke tessellation patches

Adds quick accepts to the switch statement in
GrStrokeHardwareTessellator::prepare() that allow us to write out most
tessellation patches immediately. This avoids making function calls
into recursive methods as well as avoiding some of their checks that
aren't necessary the first time around.

Also adds a microbench that mimics the MotionMark "paths" benchmark
and measures our CPU-side prepare() time.

This shaves up to 30% off the microbenchmarks.

Bug: chromium:1172543
Change-Id: Idc93bebb79db9898a4ec241b1f6c8b9eb9ba7da3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/372602
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
2 files changed