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I've never had hotspot not be fast enough. Even on 20Gb traces, everything is instant.

Only thing that ever takes some time is the initial load of the perf file and filtering (bit still really fast).

Unfortunately, I can't find the original perf file I get the flamegraph https://laladrik.xyz/img/pic.svg out of. However, I can create with a similar bunch of data and provide it soon.

Ok, now I remember what was the deal with Hotspot. It makes it possible to work with a flamegraph of mine. However, it takes almost half a minute to load my perf.data. However! I totally recommend Hotspot over my hack in case when you need to have a comprehensive view of the data. In particular, I love to see the off-CPU load, which my FlameGraphViewer doesn't show.

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