The getEntriesByType()
method returns a list of PerformanceEntry
objects for a given type. The list's members (entries) can be created by making performance marks or measures (for example by calling the mark()
method) at explicit points in time.
Note: This feature is available in Web Workers.
Syntax
entries = window.performance.getEntriesByType(type);
Arguments
- type
- The type of entry to retrieve such as "
mark
". The valid entry types are listed inPerformanceEntry.entryType
.
Return value
- entries
- A list of
PerformanceEntry
objects that have the specifiedtype
. The items will be in chronological order based on the entries'startTime
. If no objects have the specifiedtype
, or no argument is provided, an empty list is returned.
Example
function usePerformanceEntryMethods() { log("PerformanceEntry tests ..."); if (performance.mark === undefined) { log("... performance.mark Not supported"); return; } // Create some performance entries via the mark() method performance.mark("Begin"); doWork(50000); performance.mark("End"); performance.mark("Begin"); doWork(100000); performance.mark("End"); doWork(200000); performance.mark("End"); // Use getEntries() to iterate through the each entry var p = performance.getEntries(); for (var i=0; i < p.length; i++) { log("Entry[" + i + "]"); checkPerformanceEntry(p[i]); } // Use getEntries(name, entryType) to get specific entries p = performance.getEntries({name : "Begin", entryType: "mark"}); for (var i=0; i < p.length; i++) { log("Begin[" + i + "]"); checkPerformanceEntry(p[i]); } // Use getEntriesByType() to get all "mark" entries p = performance.getEntriesByType("mark"); for (var i=0; i < p.length; i++) { log ("Mark only entry[" + i + "]: name = " + p[i].name + "; startTime = " + p[i].startTime + "; duration = " + p[i].duration); } // Use getEntriesByName() to get all "mark" entries named "Begin" p = performance.getEntriesByName("Begin", "mark"); for (var i=0; i < p.length; i++) { log ("Mark and Begin entry[" + i + "]: name = " + p[i].name + "; startTime = " + p[i].startTime + "; duration = " + p[i].duration); } }
Specifications
Specification | Status | Comment |
---|---|---|
Performance Timeline Level 2 The definition of 'getEntriesByType()' in that specification. |
Candidate Recommendation | |
Performance Timeline The definition of 'getEntriesByType()' in that specification. |
Recommendation | Initial definition. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
getEntriesByType | Chrome
Full support
28
| Edge Full support 12 | Firefox Full support Yes | IE Full support Yes | Opera
Full support
15
| Safari Full support 11 | WebView Android Full support Yes | Chrome Android
Full support
28
| Firefox Android Full support 25 | Opera Android
Full support
15
| Safari iOS Full support 11 | Samsung Internet Android
Full support
1.5
|
Legend
- Full support
- Full support
- Requires a vendor prefix or different name for use.
- Requires a vendor prefix or different name for use.