Node Cookbook - Third Edition

How it works...

A flamegraph is generated by sampling the execution stack of our application during a benchmark. A sample is a snapshot of all the functions being executed (nested) at the time it was taken. It records the functions that were currently executed by the CPU at that time, plus all the others that called it.

The sampled stacks are collected and grouped together based on the functions called in them. Each of those group is a "flame". Flames have common function calls at various levels of the stack.

Each line (y axis) in a flame is a function call - known as a frame. The width of each frame corresponds to the amount of time it was observed on the CPU. The time representation is an aggregate of all nested function calls.For instance, ...