![]() In this case, the Self Time for a would be 5 seconds and the Total Time for a is 8 seconds. You can expand each table row to see where that function was called from.įor example, take the following code: function a () a () The "Total Time" of a function is the sum of the time spent in that function and all functions that it calls. Each row represents a function in your program, and by default they're ordered by how much time is spent in that specific function. This is a bottom-up view of your program. When you open one of these files, you will first be presented with a table view that looks something like this: VS Code has an integrated visualizer that supports viewing JavaScript. You can select that file to open it in the built-in profile viewer. cpuprofile will be saved in your workspace folder automatically. profile () doSomeVeryExpensiveWork () console. A CPU profile will be collected between these two call sites. You can manually instrument your code using calls to console.profile to start a profile, and console.profileEnd to stop a profile. After the profile is collected, the profile viewer will open automatically. If you chose the first option, you can stop the profile by clicking the big red "record" icon shown in the debug toolbar. Take the profile until you hit a certain breakpoint.Take the profile until you stop it manually.VS Code will then ask what type of performance profile you'd like to take pick the one that's relevant for you.įinally, VS Code will ask when you want to stop taking a profile. You can also run this command from the Command Palette ( ⇧⌘P (Windows, Linux Ctrl+Shift+P)). Hover over the session you want to debug, and select the Take Performance Profile button. ![]() Once you're debugging, switch to the Run and Debug view ( ⇧⌘D (Windows, Linux Ctrl+Shift+D)), and find the Call Stack view.
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