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Author	SHA1	Message	Date
James M Snell	67269fd7f3	perf_hooks: implementation of the perf timing API An initial implementation of the Performance Timing API for Node.js. This is the same Performance Timing API implemented by modern browsers with a number of Node.js specific properties. The User Timing mark() and measure() APIs are implemented, garbage collection timing, and node startup milestone timing. ```js const { performance } = require('perf_hooks'); performance.mark('A'); setTimeout(() => { performance.mark('B'); performance.measure('A to B', 'A', 'B'); const entry = performance.getEntriesByName('A to B', 'measure')[0]; console.log(entry.duration); }, 10000); ``` The implementation is at the native layer and makes use of uv_hrtime(). This should enable eventual integration with things like Tracing and Inspection. The implementation is extensible and should allow us to add new performance entry types as we go (e.g. for measuring i/o perf, etc). Documentation and a test are provided. PR-URL: https://github.com/nodejs/node/pull/14680 Reviewed-By: Matteo Collina <matteo.collina@gmail.com>	7 years ago

Author

SHA1

Message

Date

James M Snell

67269fd7f3

perf_hooks: implementation of the perf timing API

An initial implementation of the Performance Timing API for Node.js.
This is the same Performance Timing API implemented by modern browsers
with a number of Node.js specific properties. The User Timing mark()
and measure() APIs are implemented, garbage collection timing, and
node startup milestone timing.

```js
const { performance } = require('perf_hooks');

performance.mark('A');
setTimeout(() => {
  performance.mark('B');
  performance.measure('A to B', 'A', 'B');
  const entry = performance.getEntriesByName('A to B', 'measure')[0];
  console.log(entry.duration);
}, 10000);
```

The implementation is at the native layer and makes use of uv_hrtime().
This should enable *eventual* integration with things like Tracing
and Inspection.

The implementation is extensible and should allow us to add new
performance entry types as we go (e.g. for measuring i/o perf,
etc).

Documentation and a test are provided.

PR-URL: https://github.com/nodejs/node/pull/14680
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

7 years ago

1 Commits (cc443cb44706d5751378d6512ab619eed9976150)