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Refactor benchgfx #10191

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merged 1 commit into from Nov 8, 2019

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@ZehMatt
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ZehMatt commented Nov 3, 2019

The old benchgfx was a little bit odd and did not really tell anything other than how much time really elapsed, on top there was a pretty good variance in it.

A few things this PR does:

  • It will generate now a screenshoft by zoom levels * rotations * iterations.
  • Pre-initialize viewports and dpis before making screenshots, before they had been included in the time but initialization usually happens only once, also fixing a bug where the viewport zoom was incorrectly initialized resulting in always having a viewport at zero.
  • The new default value for the iteration count is now defaulted to 20 to reflect the changes.
  • Raises accuracy by using double instead of float.
  • The variance is now gone because initialization can vary a bit due to memory allocation.
  • More meaningful output which is also easier to parse if one must.
>openrct2 benchgfx parks/bpb.sv6 20
Engine: Software
Render Count: 240
Zoom[0] average: 0.058009s, 17 FPS
Zoom[1] average: 0.026519s, 38 FPS
Zoom[2] average: 0.012787s, 78 FPS
Total average: 0.032438s, 31 FPS
Time: 7.78519s

Having multiple runs now has at best a variance of 1 FPS which is now more than okay.

@ZehMatt ZehMatt requested a review from IntelOrca Nov 3, 2019
@ZehMatt ZehMatt force-pushed the ZehMatt:refactor/benchgfx branch from c100b34 to b79563f Nov 3, 2019
@janisozaur janisozaur self-requested a review Nov 7, 2019
@ZehMatt ZehMatt force-pushed the ZehMatt:refactor/benchgfx branch from b79563f to 1abe074 Nov 8, 2019
@ZehMatt ZehMatt force-pushed the ZehMatt:refactor/benchgfx branch from 1abe074 to d3103b6 Nov 8, 2019
@ZehMatt ZehMatt merged commit f4a1b75 into OpenRCT2:develop Nov 8, 2019
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@ZehMatt ZehMatt deleted the ZehMatt:refactor/benchgfx branch Nov 8, 2019
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