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>
* internal/errors - assert should already be in place when calling any
of the message generating functions.
* No lazy load if not necessary.
* Replace function calls with `if`s.
PR-URL: https://github.com/nodejs/node/pull/14167
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/13857
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
1) Add missing lazy assert call
2) Remove obsolete error type
3) Name undocumented error type more appropriate
4) Consolidate error type style (rely on util.format
instead of using a function)
5) Uppercase the first letter from error messages
6) Improve some internal error parameters
PR-URL: https://github.com/nodejs/node/pull/13857
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
process.hrtime() incorrectly passed the function name to
errors.TypeError instead of the name of the argument.
Additionally, the type of the actual argument was added to the error
message and a new error code ERR_INVALID_ARRAY_LENGTH was added.
PR-URL: https://github.com/nodejs/node/pull/13739
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/13285
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Enablie a lint rule to require `===` and `!==` instead of `==` and `!=`
except in some well-defined cases:
* comparing against `null` as a shorthand for also checking for
`undefined`
* comparing the result of `typeof`
* comparing literal values
In cases where `==` or `!=` are being used as optimizations, use an
ESLint comment to disable the `eqeqeq` rule for that line explicitly. I
rather like this because it's a signal that the usage is intentional and
not a mistake.
PR-URL: https://github.com/nodejs/node/pull/12446
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Make sure `constants` object and all the nested objects don't inherit
from `Object.prototype` but from `null`.
PR-URL: https://github.com/nodejs/node/pull/10458
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
Fixing a typo in comments, the word 'remaining' had a typo.
PR-URL: https://github.com/nodejs/node/pull/11503
Fixes: https://github.com/nodejs/node/issues/11491
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Creating an object in JS and using a typed array to transfer values
from C++ to JS is faster than creating an object and setting
properties in C++.
The included benchmark shows ~34% increase in performance with this
change.
PR-URL: https://github.com/nodejs/node/pull/11497
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Move some code around so we can properly test whether the switch
actually does anything.
PR-URL: https://github.com/nodejs/node/pull/11255
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
Assigns a static identifier code to all runtime and documentation
only deprecations. The identifier code is included in the emitted
DeprecationWarning.
Also adds a deprecations.md to the API docs to provide a central
location where deprecation codes can be referenced and explained.
PR-URL: https://github.com/nodejs/node/pull/10116
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Michal Zasso <targos@protonmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
* Add benchmarks for diffing a previous result
* Improvements to the documentation, including type annotation
* Update the outdated comments in src/node.cc, improve comments
in lib/internal/process.js
* Check the argument is an Array Tuple with length 2
PR-URL: https://github.com/nodejs/node/pull/10764
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Brian White <mscdex@mscdex.net>
The require('constants') module is currently undocumented and mashes
together unrelated constants. This refactors the require('constants')
in favor of distinct os.constants, fs.constants, and crypto.constants
that are specific to the modules for which they are relevant. The
next step is to document those within the specific modules.
PR-URL: https://github.com/nodejs/node/pull/6534
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Robert Lindstaedt <robert.lindstaedt@gmail.com>
Add process.cpuUsage() method that returns the user and system
CPU time usage of the current process
PR-URL: https://github.com/nodejs/node/pull/6157
Reviewed-By: Robert Lindstaedt <robert.lindstaedt@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Ben Noordhuis
James M Snell
Vse Mozhet Byt
Ruben Bridgewater
Rich Trott
Tobias Nießen
sreepurnajasti
Sakthipriyan Vairamani (thefourtheye)
levsthings
Brian White
Joyee Cheung
Michaël Zasso
Adri Van Houdt
Steven R. Loomis
Patrick Mueller
Jeremiah Senkpiel