I still think we should find a way to integrate the two somehow - i.e. analyze locally and then send the pre-analyzed data for visualization purposes to the remote firefox profiler. Does anyone know a good format we could use for that purpose? It needs to be non-verbose to not hit the infamous 2GB/4GB JSON heap size limitation on import e.g. Similarly, we also need something that can deal with the various cost types we support in hotspot, most notably off-CPU time.
Great tool that has been really helpful in helping me find unexpected bottlenecks in the codebases I've been working on.
It's easy to use, and pairs beautifully with the unintrusive perf tool, which makes the combination a joy to use.
And, if combined with a codebase opened in QtCreator, you can click on a hotspot in the flamegraph, and it will bring you automagically to the correct file and line in QtCreator, without any explicit linking required between the two programs. I discovered that feature accidentally, and the fact that it just worked seamlessly really impressed me. (Tested on a Debian-based Linux).
A big thanks to KDAB for making this tool available to us!
And to people using other IDE/editors - you can configure which one gets opened when you click on a source line from the hotspot settings. QtCreator is just the default (when that is installed).
It's a pity, Hotspot is abandoned in Debian. Just because of policykit [1]. The package seems to be rather easy to maintain (it has a tiny rule file, small control and only 2 patches).
I primarily do macOS development work and use Instruments for profiling, but have been working on Linux a lot lately and Hotspot has been pulled out a lot over the last few weeks. Highly recommended.
I'm on FreeBSD, so its a lot of overhead to check myself: But, does this have a source view like Vtune, that can attribute cycles / cache misses / etc, to a line of code? I see it has an assembly view..
Readit News
It's easy to use, and pairs beautifully with the unintrusive perf tool, which makes the combination a joy to use.
And, if combined with a codebase opened in QtCreator, you can click on a hotspot in the flamegraph, and it will bring you automagically to the correct file and line in QtCreator, without any explicit linking required between the two programs. I discovered that feature accidentally, and the fact that it just worked seamlessly really impressed me. (Tested on a Debian-based Linux).
A big thanks to KDAB for making this tool available to us!
And to people using other IDE/editors - you can configure which one gets opened when you click on a source line from the hotspot settings. QtCreator is just the default (when that is installed).
[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1025573
Maybe I should check out hotspot again.