Class Profiler

Return the total time of each captured frame, in chronological order (up to the last 600 frames).

Return the measures for all the section of the game during the frames captured, as a plain tree (no back-references): safe to serialize with JSON.stringify.

Return, for each section, the maximum time it took during a single captured frame - the "worst frame" per section, catching the spikes that averages hide. Plain tree, safe to serialize with JSON.stringify.

Convert measures for a section into texts. Useful for ingame profiling.

Get stats measured during the frames captured.

Record what the 3D renderer did on this frame: its cheap per-frame counters, and the shader programs it is holding.

The renderer compiles a separate program for every distinct combination of the things that shape a shader - material features, the number of lights of each kind, fog, shadow filtering, clipping planes, tone mapping, instancing, and more. Whenever the game moves any of them onto a combination that has not been seen before, that program is compiled and linked on the spot: the cost lands on a single frame, and never again for that combination. It shows up as unexplained stutter early in a playthrough, which is why it is worth measuring rather than guessing.

Rather than assume a cause, this compares the cache keys the renderer itself uses to tell programs apart, and reports which fields differ from the closest program already seen.