See the Critical Rendering Path in the browser

Layout Reflow in the Browser

Solving layout reflow

Solving layout thrashing by caching measured value

Solving layout thrashing with debounce

Memory allocation and garbage collection in Javascript

Save and load an app's profile session

Profiling a nodejs app from the chrome dev tools

Manage Memory and Garbage Collection in Node.js

Find DOM memory leaks in Google Chrome

Easily detect memory leak source using chrome dev tools allocation instrumentation

Trace memory allocating functions using chrome dev tools

Javascript Performance

Monitoring an app is a powerful tool for performance and debugging.  Sometimes you'd might want to save profiles for later comparison or to share with colleagues. In this lesson, you'll see how to save a profile session to disk and load it back in chrome dev tools.

Yonatan Kra: [0:01] Monitoring your application's performance is very important. Sometimes, you'd like to share your recording with others. For instance, you'd like to send a recording to a performance specialist or your team lead, or you'd might like to attach it to a JIRA ticket, or just have a reliable recording for a demo.

[0:20] I'll open the DevTools in the Performance tab. I'll start the recording, playing around with the application, and stop the recording.

[0:33] Now that we have the recording results, we can save it to a file by right-clicking anywhere in your Performance tab and select Save profile. We can save the file to a folder on disk. You see I already have a few profiles in this folder. The profiles are just JSON files.

[0:54] Now that the file is saved, you can load it back in the browser. Right-click in the Performance tab, select Load profile. In the file explorer, select the file that you want. Chrome will now process the file and reload the app's profile.

[1:09] You can now investigate the results of the monitoring or compare them to newer profile sessions.

Course

Javascript Performance

Save and load an app's profile session

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