Hi
These are benchmarks with a selected videomodes group on DOS:
using -O2 Graphics driver: "VESA" Driver readp drawp line hline vline block v2v v2r r2v LFB8 640x 480 1.47 1.52 1.88 6.64 1.69 6.63 2.85 7.13 6.65 LFB8 800x 600 1.40 1.52 1.87 6.65 1.67 6.64 2.87 7.27 6.65 LFB8 1024x 768 1.40 1.49 1.87 6.67 1.68 6.67 2.87 7.21 6.68 LFB16 640x 480 1.40 1.46 1.85 3.37 1.67 3.36 1.50 3.98 3.36 LFB16 800x 600 1.40 1.46 1.84 3.34 1.64 3.34 1.50 3.98 3.34 LFB16 1024x 768 1.33 1.44 1.82 3.32 1.62 3.32 1.49 3.93 3.31 LFB24 640x 480 1.17 0.79 0.87 2.21 0.79 2.21 0.94 2.38 2.21 LFB24 800x 600 1.17 0.79 0.86 2.21 0.78 2.20 0.95 2.40 2.20 LFB24 1024x 768 1.17 0.78 0.85 2.18 0.77 2.17 0.94 2.38 2.17 RAM8 640x 480 7.00 6.79 16.34 161.54 9.28 236.21 143.64 0.00 0.00 RAM8 800x 600 5.60 6.22 16.67 212.66 9.17 246.14 148.97 0.00 0.00 RAM8 1024x 768 5.60 6.22 12.92 196.87 7.10 165.46 106.94 0.00 0.00 RAM16 640x 480 7.00 6.22 14.89 121.15 8.44 121.13 71.82 0.00 0.00 RAM16 800x 600 7.00 6.22 12.50 91.14 7.11 85.61 54.17 0.00 0.00 RAM16 1024x 768 7.00 6.22 10.09 65.62 5.49 58.98 44.51 0.00 0.00 RAM24 640x 480 5.60 5.74 9.21 53.85 6.79 61.35 36.32 0.00 0.00 RAM24 800x 600 5.60 5.33 8.12 45.57 5.81 47.16 31.18 0.00 0.00 RAM24 1024x 768 5.60 5.74 7.19 41.45 5.24 40.06 28.69 0.00 0.00
using -O6 -fomit--frame-pointer Graphics driver: "VESA" Driver readp drawp line hline vline block v2v v2r r2v LFB8 640x 480 1.40 1.59 1.88 6.64 1.68 6.63 2.85 7.13 6.64 LFB8 800x 600 1.47 1.59 1.87 6.65 1.68 6.64 2.87 7.27 6.65 LFB8 1024x 768 1.47 1.59 1.87 6.67 1.67 6.67 2.87 7.20 6.67 LFB16 640x 480 1.40 1.46 1.85 3.37 1.67 3.36 1.50 3.99 3.36 LFB16 800x 600 1.40 1.46 1.84 3.36 1.65 3.34 1.50 3.99 3.34 LFB16 1024x 768 1.40 1.44 1.83 3.32 1.63 3.32 1.49 3.93 3.31 LFB24 640x 480 1.22 0.77 0.88 2.22 0.79 2.21 0.94 2.38 2.21 LFB24 800x 600 1.17 0.76 0.87 2.21 0.78 2.20 0.95 2.40 2.20 LFB24 1024x 768 1.17 0.75 0.85 2.18 0.77 2.17 0.94 2.38 2.17 RAM8 640x 480 7.00 7.46 16.34 161.54 9.28 236.21 143.64 0.00 0.00 RAM8 800x 600 7.00 6.79 16.25 212.66 9.41 238.68 144.94 0.00 0.00 RAM8 1024x 768 5.60 6.79 12.92 157.50 7.21 165.46 106.94 0.00 0.00 RAM16 640x 480 9.33 6.79 14.89 121.15 8.44 121.13 73.49 0.00 0.00 RAM16 800x 600 9.33 6.22 12.74 79.75 7.11 85.61 53.63 0.00 0.00 RAM16 1024x 768 7.00 6.22 10.09 65.62 5.43 59.26 44.51 0.00 0.00 RAM24 640x 480 5.60 6.22 9.93 60.58 6.63 62.16 36.32 0.00 0.00 RAM24 800x 600 5.60 5.74 8.90 45.57 5.90 47.45 31.18 0.00 0.00 RAM24 1024x 768 5.60 5.33 7.95 41.45 5.36 40.19 28.69 0.00 0.00
The differences are very small, so I think we can use -O2 by default.
Incidentally, speedtst crash my computer using the Vesa driver in 16 color. Can any body confirms that? I suspect there is a bug in the framedriver.
M.Alvarez