Performance: getEntries() method

The getEntries() method returns an array of all PerformanceEntry objects currently present in the performance timeline.

If you are only interested in performance entries of certain types or that have certain names, see getEntriesByType() and getEntriesByName().

Note: This method does not notify you about new performance entries; you will only get entries that are present in the performance timeline at the time you call this method. To receive notifications about entries as they become available, use a PerformanceObserver.

The following entry types are not supported by this method at all and won't be returned even if entries for these types might exist:

To access entries of these types, you must use a PerformanceObserver instead.

Syntax

js

getEntries()

Parameters

None.

Return value

An Array of PerformanceEntry objects. The items will be in chronological order based on the entries' startTime.

Examples

Logging all performance markers and measures

Assuming you created your own PerformanceMark and PerformanceMeasure objects at appropriate places in your code, you might want to log all them to the console like this:

js

// Example markers/measures
performance.mark("login-started");
performance.mark("login-finished");
performance.mark("form-sent");
performance.mark("video-loaded");
performance.measure("login-duration", "login-started", "login-finished");

const entries = performance.getEntries();

entries.forEach((entry) => {
  if (entry.entryType === "mark") {
    console.log(`${entry.name}'s startTime: ${entry.startTime}`);
  }
  if (entry.entryType === "measure") {
    console.log(`${entry.name}'s duration: ${entry.duration}`);
  }
});

Specifications

Specification
Performance Timeline
# dom-performance-getentries

Browser compatibility

BCD tables only load in the browser

See also