From the course: Node.js: Debugging and Performance Tuning
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Profiling code execution
From the course: Node.js: Debugging and Performance Tuning
Profiling code execution
- [Instructor] So far, we've used external tools and internal code changes to get a glimpse into the performance of our application's code execution. There's another technique that's already built into node, profiling. Software profiling is a form of dynamic program analysis, which means that the program is actually running when the analysis is performed. Profiling can answer questions like the number of times each method is called and how long the methods take. Often, these include resource usage such as the amount of memory or CPU that's used. Node has a built-in profiler which in turn uses the V8's profiler. Node's profiler records important events such as just-in-time compiles and regular samples. The record of these events in samples is saved to a log file. On their own, these profiler logs aren't very useful. The information is better read with a tool that aggregates events and produces reports. Fortunately, Node also includes a V8 profiler processor that we're going to use…
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