For a release build, performance could be better

[tannerhelland]

While performance may not be relevant to all users, I'm a little curious why perf of this build is poor relative to other builds.

For reference I have run small comparisons on this build vs a fresh build using VS2017 + v141_xp toolchain built with /O2 (similar to this one ), and also Olaf's cairo/sqlite mashup from http://www.vbrichclient.com/#/en/Downloads.htm (which can be used as a "drop-in replacement" for VBcairo.dll).

Testing something simple like rendering a large radial gradient (8 mp) yields times roughly on the range of 800 ms for this build, 600 ms for Olaf's build, and 400 ms for a default /O2 build. Linear gradients show a similar perf spread.

These timings seem particularly odd since Olaf's cairo is based off a very old build (1.9.4 as reported by the dll) and I would expect at least some pixman improvements since then.

Given that an /O2 build adds barely 200 kb to the final dll, would it be worthwhile to revisit current optimization settings?