It's a flame graph or flame chart. I found this video explaining how to use them: https://www.youtube.com/watch?v=g0g4ML4nhPg https://www.youtube.com/watch?v=g0

It's a flame graph or flame chart. I found this video explaining how to use them: https://www.youtube.com/watch?v=g0g4ML4nhPg https://www.youtube.com/watch?v=g0g4ML4nhPg I think the basic idea is: say you have some code like this. function a() { // 6 ms b(); // 3 ms c(); // 3 ms } Then you might have a flame chart that looks like this: [-b-][-c] [---a---] Essentially you're decomposing the time we spend in a() into its constituent pieces b() and c().