web api instance property
Window: performance property
The performance property of the Window interface returns a Performance object, which can be used to gather performance information about code running in the window’s scope.
Performance entries are per context. If you create a mark on the main thread (or other worker), you cannot see it in a worker thread, and vice versa.
Value
A Performance object offering access to performance and timing-related information about code running in the window’s scope.
Specifications
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.