Post #3933700

In case anyone's interested, now that #NVDASR has moved to 64 bit, we can use py-spy (a sampling profiler) to get performance profiles of NVDA while it's running. I wrote this (admittedly rather crappy) profile viewer web app to make analysing those profiles easier. It lets you switch threads, it sorts the samples by count (highest to lowest), it shows percentages of the total count and it lets you see the inverted stack for each sample (collapsed by default). There's a demo profile in the app if you just want to see what it looks like. There are much better profile viewers of course. py-spy can output Speedscope profiles, but Speedscope isn't screen reader accessible. There's the Firefox profiler for which the call tree is very accessible, but it can't load Speedscope or raw py-spy profiles, and even though it can load chrometrace profiles which py-spy can generate, they don't seem to show the call tree. So this at least makes NVDA profiles accessible to those of us who are screen reader users. https://files.jantrid.net/nvdaProf/