Flame graphs are definitely less sophisticated than Superluminal/Tracy/etc, but that's a part of the attraction - you can visualize the output of many profiling

Flame graphs are definitely less sophisticated than Superluminal/Tracy/etc, but that's a part of the attraction - you can visualize the output of many profiling tools as a flamegraph without prior setup. I also think it's a pretty good UX for the "which function is the performance bottleneck" game.