improve verts bench

- exercise different options
- reduce triangle sizes to emphasize overhead (small triangles is also common)

Change-Id: I24ff889cdeeba136349b3a855c6b5881109e2a88
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/235461
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
Auto-Submit: Mike Reed <reed@google.com>
1 file changed