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copied!<p>What do you want to measure? I suggest fillrate and triangle rate. Basically fillrate is how many pixels your rasterizer can spit out each second, Triangle rate is how many triangles your rasterizer + affine transformation functions can push out each second, independent of the fillrate. Here's my suggestion for measuring both:</p> <p>To measure the fillrate without getting <em>noise</em> from the time used for the triangle setup, use only two triangles, which forms a quad. Start with a small size, and then increase it with a small interval. You should eventually find an <em>optimal size</em> with respect to the render time of one second. If you don't, you can perform blending, with full-screen triangle pairs, which is a pretty slow operation, and which only burns fillrate. The fillrate becomes <em>width x height</em> of your rendered triangle. For example, <em>4 megapixels / second</em>.</p> <p>To measure the triangle rate, do the same thing; only for triangles this time. Start with two tiny triangles, and increase the <em>number</em> of triangles until the rendering time reaches one second. The time used by the triangle/transformation setup is much more apparent in small triangles than the time used to fill it. The units is <em>triangle count/second</em>.</p> <p>Also, the overall time used to render a frame might be comparable too. The render time for a frame is the derivative of the global time, i.e <em>delta time</em>. The reciprocal of the delta time is the number of <em>frames per second</em>, if that delta time was constant for all frames.</p> <p>Of course, for these numbers to be half-way comparable across rasterizers, you have to use the same techniques and features. Comparing numbers from a rasterizer which uses per-pixel lighting against another which uses flat-shading doesn't make much sense. Resolution and color depth should also be equal.</p> <p>As for optimization, getting a proper profiler should do the trick. GCC has the GNU profiler gprof. If you want an opinion on clever things to optimize in a rasterizer, ask that as a seperate question. I'll answer to the best of my ability.</p>

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