• Optimize large tiled backgrounds by prerendering a few repeats into the 

    texture cache.

Timings:

* Page with nothing but a 1x1 tiled background -- 100. ms -> 0.423 ms
  (236x improvement)

* https://miiverse.nintendo.net/guide/ -- 3.11 ms -> 2.12 ms (47%
  improvement)

* http://en.wikipedia.org/wiki/Servomechanism -- 0.951 ms -> 0.842 ms
  (13% improvement)
    @pcwalton
    pcwalton committed Oct 30, 2015
    8f6610c