Linux perf is not especially useful so long as the GLContext::raw_fReadPixels() (which I understand to be some sort of extra GL readback that is avoided on other platforms) dominates which is, iiuc, a well-known and long-standing issue on FF Linux. The main interesting thing I think is the variation of JS perf on Windows.
Bug 1517916 Comment 9 Edit History
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Linux perf numbers are not especially useful so long as the GLContext::raw_fReadPixels() (which I understand to be some sort of extra GL readback that is avoided on other platforms) dominates which is, iiuc, a well-known and long-standing issue on FF Linux. The main interesting thing I think is the variation of JS perf on Windows.