[wging]

It's a flame graph or flame chart. I found this video explaining how to use them: 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().

[brendangregg]

essentially, yes, but:

flame graphs: x-axis is sample population (or event time), alphabetical sort on function names to maximize merging

flame charts: x-axis is the passage of time