GPU fill rate baseline

An ideal web-page is rendered by shading each pixel exactly once with no work done by the shader. We can estimate this case by drawing a full-screen rectangle and capturing the GPU time, which is what gl-bench tool does.

On this page, we are going to collect different numbers (in millisecond time) reported by the tool:

System	Driver	Renderer	Resolution	Full-screen	Mega-pixel
Linux/GLX	Mesa 17.2.2	Intel(R) HD 4600 (Haswell, 0x412)	3840x2160	1.64	0.20
Linux/GLX	Mesa 17.2.4	Intel(R) HD Graphics 520 (Skylake GT2)	2560x1440	0.56	0.15
Windows7	21.19.407.0	Radeon (TM) RX 480 Graphics	1920x1080	0.05	0.03