* Update the user timing implementation to conform to
User Timing Level 3.
* Reimplement user timing and timerify with pure JavaScript
implementations
* Simplify the C++ implementation for gc and http2 perf
* Runtime deprecate additional perf entry properties
in favor of the standard detail argument
* Disable the `buffered` option on PerformanceObserver,
all entries are queued and dispatched on setImmediate.
Only entries with active observers are buffered.
* This does remove the user timing and timerify
trace events. Because the trace_events are still
considered experimental, those can be removed without
a deprecation cycle. They are removed to improve
performance and reduce complexity.
Old: `perf_hooks/usertiming.js n=100000: 92,378.01249733355`
New: perf_hooks/usertiming.js n=100000: 270,393.5280638482`
PR-URL: https://github.com/nodejs/node/pull/37136
Refs: https://github.com/nodejs/diagnostics/issues/464
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
It seems that **Default:** was unofficially decided on as
the way to specify default values. This commit updates the API
documentation to use this format more consistently.
PR-URL: https://github.com/nodejs/node/pull/37387
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@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: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Pooja D P <Pooja.D.P@ibm.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/37274
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Zijian Liu <lxxyxzj@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Adds a new `perf_hooks.createHistogram()` API for creating histogram
instances that allow user recording.
Makes Histogram instances cloneable via MessagePort. This allows, for
instance, an event loop delay monitor to be running on the main thread
while the histogram data can be monitored actively from a worker thread.
Signed-off-by: James M Snell <jasnell@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/37155
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
The value accepted by histogram.percentile may be below 1 too.
PR-URL: https://github.com/nodejs/node/pull/36938
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Allow calling eventLoopUtilization() directly on a worker thread:
const worker = new Worker('./foo.js');
const elu = worker.performance.eventLoopUtilization();
setTimeout(() => {
worker.performance.eventLoopUtilization(elu);
}, 10);
Add a new performance object on the Worker instance that will hopefully
one day hold all the other performance metrics, such as nodeTiming.
Include benchmarks and tests.
PR-URL: https://github.com/nodejs/node/pull/35664
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/35479
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Harshitha K P <harshitha014@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
This helps catch broken links as part of the test suite. This also
improves the user experience when browsing the markdown files.
PR-URL: https://github.com/nodejs/node/pull/35191
Fixes: https://github.com/nodejs/node/issues/35189
Reviewed-By: Derek Lewis <DerekNonGeneric@inf.is>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Entries in perf_hooks.md are almost-but-not-quite in alphabetical order.
Our docs (usually) list things in alphabetical order, so move a few
entries to make it so in perf_hooks.md.
PR-URL: https://github.com/nodejs/node/pull/34973
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Harshitha K P <harshitha014@gmail.com>
Use uv_metrics_idle_time() to return a high resolution millisecond timer
of the amount of time the event loop has been idle since it was
initialized.
Include performance.eventLoopUtilization() API to handle the math of
calculating the idle and active times. This has been added to prevent
accidental miscalculations of the event loop utilization. Such as not
taking into consideration offsetting nodeTiming.loopStart or timing
differences when being called from a Worker thread.
PR-URL: https://github.com/nodejs/node/pull/34938
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Adrian Estrada <edsadr@gmail.com>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>
The docs use `* Extends: {type}` to define inheritance. This
commit updates the perf_hooks documentation to be consistent.
PR-URL: https://github.com/nodejs/node/pull/33777
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Notable changes:
* ECMAScript Modules - `--experimental-modules` flag removal
* AsyncLocalStorage API (experimental)
* REPL previews
* REPL reverse-i-search
* REPL substring-based search
* Error monitoring
* Monitoring `error` events
* Monitoring uncaught exceptions
* File system APIs
* New function: `fs.readv`
* Optional parameters in `fs.read`
* Console `groupIndentation` option
* `maxStringLength` option for `util.inspect()`
* Stable N-API release 6
* Stable diagnostic reports
* Increase of the default server headers timeout
* New `--trace-sigint` CLI flag
* Various crypto APIs now support Diffie-Hellman secrets
* Added support for the `dns.ALL` flag in `dns.lookup()`
* Added a new experimental API to interact with Source Map V3 data
* Added support for passing a `transferList` along with `workerData` to
the `Worker` constructor
PR-URL: https://github.com/nodejs/node/pull/33197
- Add clarifications for Node.js-only extensions
- Explain the Web Performance APIs implemented in Node.js and
clarify that perf_hooks also include other non-Web APIs.
- Prefix exposed interfaces with `perf_hooks.` to distinguish
them from internal classes.
PR-URL: https://github.com/nodejs/node/pull/33199
Refs: https://github.com/nodejs/node/issues/28635
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
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>
Replace `{Array}` with `{type[]}`.
PR-URL: https://github.com/nodejs/node/pull/19895
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
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>
