@perf-tools/performance

User Timing polyfill

npm i --save @perf-tools/performance

Usage

// Polyfill
import from '@perf-tools/performance';

// As module
import { performance } from '@perf-tools/performance';

Supported

• Browser, Worker and NodeJS
• API:
  • now - Returns a DOMHighResTimeStamp representing the number of milliseconds elapsed since a reference instant.
  • mark - Creates a timestamp in the browser's performance entry buffer with the given name.
  • measure - Creates a named timestamp in the browser's performance entry buffer between two specified marks (known as the start mark and end mark, respectively).
  • getEntries - Returns a list of PerformanceEntry objects based on the given filter.
  • getEntriesByType - Returns a list of PerformanceEntry objects of the given entry type.
  • getEntriesByName - Returns a list of PerformanceEntry objects based on the given name and entry type.
  • clearMarks - Removes the given mark from the browser's performance entry buffer.
  • clearMeasures - Removes the given measure from the browser's performance entry buffer.

Not Supported

• clearResourceTimings

Development

• npm i
• npm test, code coverage