What's New In DevTools (Chrome 64)

Welcome back! New features coming to DevTools in Chrome 64 include:

Performance Monitor

Use the Performance Monitor to get a real-time view of various aspects of a page's performance, including:

  • CPU usage.
  • JavaScript heap size.
  • The total number of DOM nodes, JavaScript event listeners, documents, and frames on the page.
  • Layouts and style recalculations per second.

To use the Performance Monitor:

  1. Open the Command Menu.
  2. Start typing Performance then select Show Performance Monitor.

    The Performance Monitor Figure 1. The Performance Monitor

  3. Click a metric to show or hide it. In Figure 1 the CPU Usage, JS heap size, and JS event listeners charts are shown.

Console Sidebar

On large sites, the Console can quickly get flooded with irrelevant messages. Use the new Console Sidebar to reduce the noise and focus on the messages that are important to you.

Using the Console Sidebar to show error messages only Figure 2. Using the Console Sidebar to show error messages only

The Console Sidebar is hidden by default. Click Show Console Sidebar Show Console
Sidebar to show it.

Group similar Console messages

The Console now groups similar messages together by default. For example, in Figure 3 there are 27 instances of the message [Violation] Avoid using document.write().

An example of the Console grouping similar messages together Figure 3. An example of the Console grouping similar messages together

Click on a group to expand it and see each instance of the message.

An example of an expanded group of Console messages Figure 4. An example of an expanded group of Console messages

Uncheck the Group Similar checkbox to disable this feature.

Feedback

The best place to discuss any of the features or changes you see here is the google-chrome-developer-tools@googlegroups.com mailing list. You can also tweet us at @ChromeDevTools if you're short on time. If you're sure that you've encountered a bug in DevTools, please open an issue.

See the devtools-whatsnew tag for links to all previous DevTools release notes.