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Commit Graph

43 Commits

Author SHA1 Message Date
Michaël Zasso
1182539307
perf_hooks: fix error message for invalid entryTypes
Will now print a more meaningful value instead of always [object Object]

PR-URL: https://github.com/nodejs/node/pull/33285
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
2020-05-10 13:53:15 +02:00
rickyes
f250adb28f perf_hooks: remove unnecessary assignment when name is undefined
PR-URL: https://github.com/nodejs/node/pull/32910
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Zeyu Yang <himself65@outlook.com>
Reviewed-By: Andrey Pechkurov <apechkurov@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
2020-04-20 17:35:02 +03:00
himself65
d0a3bf1f11 perf_hooks: allow omitted parameters in 'performance.measure'
Make `startMark` and `endMark` parameters optional.

PR-URL: https://github.com/nodejs/node/pull/32651
Fixes: https://github.com/nodejs/node/issues/32647
Refs: https://www.w3.org/TR/user-timing-2/#measure-method
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
2020-04-10 18:08:30 +08:00
James M Snell
eb2fe5ff90 perf,src: add HistogramBase and internal/histogram.js
Separating this out from the QUIC PR to allow it to be separately
reviewed. The QUIC implementation makes use of the hdr_histogram
for dynamic performance monitoring. This introduces a BaseObject
class that allows the internal histograms to be accessed on the
JavaScript side and adds a generic Histogram class that will be
used by both QUIC and perf_hooks (for the event loop delay
monitoring).

Signed-off-by: James M Snell <jasnell@gmail.com>

PR-URL: https://github.com/nodejs/node/pull/31988
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
2020-03-02 11:01:00 -08:00
Sebastien Ahkrin
9085c03806 lib: replace Map global by the primordials
PR-URL: https://github.com/nodejs/node/pull/31155
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
2020-01-04 14:56:52 -08:00
Sebastien Ahkrin
256c9a43f4 lib: replace Set global by the primordials
PR-URL: https://github.com/nodejs/node/pull/31154
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
2020-01-04 12:41:09 -08:00
Kamat, Trivikram
bf6b39dc9f perf_hooks: use for...of
PR-URL: https://github.com/nodejs/node/pull/31049
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
2020-01-04 09:55:46 -08:00
Anatoli Papirovski
4547574386 perf_hooks: remove unnecessary bind
Pass through parameters using setImmediate rather
than using Function.prototype.bind to bind the
provided context.

PR-URL: https://github.com/nodejs/node/pull/28131
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
2019-12-14 09:01:44 -05:00
Sebastien Ahkrin
eac3f0adc4
lib: replace Symbol global by the primordials Symbol
PR-URL: https://github.com/nodejs/node/pull/30737
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
2019-12-08 13:38:58 +01:00
Michaël Zasso
1f9a5ae7aa
lib: use static Number properties from primordials
PR-URL: https://github.com/nodejs/node/pull/30686
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
2019-11-30 13:45:38 +01:00
Michaël Zasso
7fc5980cfe
lib: enforce use of Boolean from primordials
Refs: https://github.com/nodejs/node/issues/30697

PR-URL: https://github.com/nodejs/node/pull/30698
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
2019-11-30 13:37:23 +01:00
Michaël Zasso
141a6e34ee
lib: enforce use of Array from primordials
PR-URL: https://github.com/nodejs/node/pull/30635
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
2019-11-27 19:29:01 +01:00
Michaël Zasso
0646eda4fc
lib: flatten access to primordials
Store all primordials as properties of the primordials object.
Static functions are prefixed by the constructor's name and prototype
methods are prefixed by the constructor's name followed by "Prototype".
For example: primordials.Object.keys becomes primordials.ObjectKeys.

PR-URL: https://github.com/nodejs/node/pull/30610
Refs: https://github.com/nodejs/node/issues/29766
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
2019-11-25 10:28:15 +01:00
Kirill Fomichev
39eb894099 perf_hooks: remove non-existent entries from inspect
Some of the milestones was removed in PR #21247 but entries not removed
from function for inspect PerformanceNodeTiming.

PR-URL: https://github.com/nodejs/node/pull/29528
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
2019-09-13 13:35:51 -07:00
Kirill Fomichev
ef9ecfbcfe perf_hooks: ignore duplicated entries in observer
PerformanceObserver should add to observing only unique entry types.

PR-URL: https://github.com/nodejs/node/pull/29442
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
2019-09-07 07:04:19 -07:00
Kirill Fomichev
6d01f1fa41 perf_hooks: remove GC callbacks on zero observers count
When all existed PerformanceObserver instances removed for type `gc` GC
callbacks should be removed.

PR-URL: https://github.com/nodejs/node/pull/29444
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
2019-09-07 07:03:04 -07:00
Kirill Fomichev
6186302654 perf_hooks: import http2 only once
Import http2 internal bindings on each collectHttp2Stats call is not
required.

PR-URL: https://github.com/nodejs/node/pull/29419
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
2019-09-05 19:33:15 -07:00
vmarchaud
0ebf01dc53
perf_hooks: add HttpRequest statistics monitoring #28445
```js
const { PerformanceObserver, performance } = require('perf_hooks');
const http = require('http');

const obs = new PerformanceObserver((items) => {
  const entry = items.getEntries()[0];
  console.log(entry.name, entry.duration);
});
obs.observe({ entryTypes: ['http'] });

const server = http.Server(function(req, res) {
  server.close();
  res.writeHead(200);
  res.end('hello world\n');
});

server.listen(0, function() {
  const req = http.request({
    port: this.address().port,
    path: '/',
    method: 'POST'
  }).end();
});
```

PR-URL: https://github.com/nodejs/node/pull/28486
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
2019-07-12 00:36:27 +02:00
Anna Henningsen
33a8093411
lib: use class ... extends in perf_hooks.js
Don’t unnecessarily set the protoype afterwards.

PR-URL: https://github.com/nodejs/node/pull/28495
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
2019-07-06 19:25:42 +02:00
cjihrig
2b8b23067d perf_hooks,trace_events: use stricter equality
There is no need to use loose equality on these checks because
undefined is caught by the preceding typeof check.

PR-URL: https://github.com/nodejs/node/pull/28166
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
2019-06-16 16:45:15 +08:00
Joyee Cheung
a38e9c438a
lib: require globals instead of using the global proxy
In addition, use process.stderr instead of console.error when
there is no need to swallow the error.

PR-URL: https://github.com/nodejs/node/pull/27112
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
2019-04-16 04:24:26 +08:00
Michaël Zasso
908292cf1f lib: enforce the use of Object from primordials
PR-URL: https://github.com/nodejs/node/pull/27146
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
2019-04-12 05:38:45 +02:00
Ruben Bridgewater
3b044962c4
errors: add more information in case of invalid callbacks
This adds the actual callback that is passed through to the error
message in case an ERR_INVALID_CALLBACK error is thrown.

PR-URL: https://github.com/nodejs/node/pull/27048
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
2019-04-04 12:51:03 +02:00
Joyee Cheung
245c96e7e5
perf_hooks: load internal/errors eagerly
Since `internal/errors` is loaded by many builtin modules and is
currently the first module loaded during bootstrap, it is
fine to load it eagerly. We just need to make sure
that `internal/errors` itself load other modules lazily.

PR-URL: https://github.com/nodejs/node/pull/26771
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
2019-03-22 00:41:09 +01:00
James M Snell
bcdd228f90
perf_hooks: implement histogram based api
Add a sampling-based event loop delay monitor.

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

const h = monitorEventLoopDelay();

h.enable();

h.disable();

console.log(h.percentiles);
console.log(h.min);
console.log(h.max);
console.log(h.mean);
console.log(h.stddev);
console.log(h.percentile(50));
```

PR-URL: https://github.com/nodejs/node/pull/25378
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
2019-02-08 09:20:18 -08:00
Joyee Cheung
475c43c1b0
perf_hooks: only enable GC tracking when it's requested
Previously a GC prologue callback and a GC epilogue callback
are always unconditionally enabled during bootstrap when
the `performance` binding is loaded, even when the user does
not use the performance timeline API to enable GC tracking.
This patch makes the callback addition conditional and only
enables them when the user explicitly requests
`observer.observe(['gc'])` to avoid the overhead.

PR-URL: https://github.com/nodejs/node/pull/25853
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: James M Snell <jasnell@gmail.com>
2019-02-06 20:02:59 +01:00
cjihrig
707b0a8534 tools: enable no-useless-constructor lint rule
This commit enables ESLint's no-useless-constructor rule. Note
that the documentation examples that only include constructor
calls were left in tact.

PR-URL: https://github.com/nodejs/node/pull/25055
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
2018-12-16 20:30:50 -08:00
Ruben Bridgewater
59257543c3
lib: use ES6 class inheritance style
PR-URL: https://github.com/nodejs/node/pull/24755
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
2018-12-05 16:55:00 +01:00
Ruben Bridgewater
dcc82b37b6
lib: remove inherits() usage
This switches all `util.inherits()` calls to use
`Object.setPrototypeOf()` instead. In fact, `util.inherits()` is
mainly a small wrapper around exactly this function while adding
the `_super` property on the object as well.

Refs: #24395

PR-URL: https://github.com/nodejs/node/pull/24755
Refs: https://github.com/nodejs/node/issues/24395
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
2018-12-05 16:53:58 +01:00
Gus Caplan
e7f710c1d4 bootstrapper: move internalBinding to NativeModule
internalBinding is used so often that it should just automatically be
available for usage in internals.

PR-URL: https://github.com/nodejs/node/pull/23025
Refs: https://github.com/nodejs/node/commit/2a9eb31
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
2018-10-04 11:55:34 +02:00
James M Snell
4fa5448e5d
http2: move process.binding('http2') to internalBinding
Refs: https://github.com/nodejs/node/issues/22160

PR-URL: https://github.com/nodejs/node/pull/22328
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
2018-08-18 12:39:59 -07:00
James M Snell
9f5cc1fc92 src: move process.binding('performance') to internalBinding
PR-URL: https://github.com/nodejs/node/pull/22029
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
2018-08-09 07:30:58 -07:00
James M Snell
b55f6a0f01 perf_hooks: remove less useful bootstrap marks
While `perf_hooks` is still in experimental, remove less useful
bootstrap milestones.

PR-URL: https://github.com/nodejs/node/pull/21247
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
2018-06-15 09:05:19 -07:00
James M Snell
2ec6995555 perf_hooks: simplify perf_hooks
Remove the `performance.getEntries()` and `performance.clear*()`
variants and eliminate the accumulation of the global timeline
entries. The design of this particular bit of the API is a memory
leak and performance footgun. The `PerformanceObserver` API is
a better approach to consuming the data in a more transient way.

PR-URL: https://github.com/nodejs/node/pull/19563
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
2018-04-03 13:57:41 -07:00
Ruben Bridgewater
c6b6c92185
lib: always show ERR_INVALID_ARG_TYPE received part
This makes a effort to make sure all of these errors will actually
also show the received input.
On top of that it refactors a few tests for better maintainability.
It will also change the returned type to always be a simple typeof
instead of special handling null.

PR-URL: https://github.com/nodejs/node/pull/19445
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
2018-03-25 01:45:37 +01:00
Timothy Gu
9256dbb611 perf_hooks: fix timing
Fixes: https://github.com/nodejs/node/issues/17892
Fixes: https://github.com/nodejs/node/issues/17893
Fixes: https://github.com/nodejs/node/issues/18992

PR-URL: https://github.com/nodejs/node/pull/18993
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
2018-03-06 07:50:01 -08:00
Michaël Zasso
1e8d110e64 lib: port errors to new system
This is a first batch of updates that touches non-underscored modules in
lib.

PR-URL: https://github.com/nodejs/node/pull/19034
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
2018-03-05 19:51:30 +01:00
James M Snell
009e41826f perf_hooks: make PerformanceObserver an AsyncResource
PR-URL: https://github.com/nodejs/node/pull/18789
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
2018-02-26 13:55:51 -08:00
James M Snell
6bcd31f2f4 perf_hooks: add warning when too many entries in the timeline
PR-URL: https://github.com/nodejs/node/pull/18087
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
2018-01-31 15:24:58 -08:00
James M Snell
20fe04f113 perf_hooks,http2: add performance.clear()
Add missing clear() method to `perf_hooks.performance` to
remove the entries from the master timeline to prevent
that from being a memory leak.

PR-URL: https://github.com/nodejs/node/pull/18046
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
2018-01-11 10:41:49 -08:00
James M Snell
a02fcd2716 http2: use aliased buffer for perf stats, add stats
Add an aliased buffer for session and stream statistics,
add a few more metrics

PR-URL: https://github.com/nodejs/node/pull/18020
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
2018-01-09 12:33:13 -08:00
James M Snell
231b1166cf http2: perf_hooks integration
Collect and report basic timing information about `Http2Session`
and `Http2Stream` instances.

PR-URL: https://github.com/nodejs/node/pull/17906
Refs: https://github.com/nodejs/node/issues/17746
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
2018-01-02 08:56:30 -08:00
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>
2017-08-23 16:00:09 -07:00