* Assert
* Calling `assert.fail()` with more than one argument is deprecated. #70dcacd710
* Calling `assert.ok()` with no arguments will now throw. #3cd7977a42
* Calling `assert.ifError()` will now throw with any argument other than `undefined` or `null`. Previously the method would throw with any truthy value. #e65a6e81ef
* The `assert.rejects()` and `assert.doesNotReject()` methods have been added for working with async functions. #599337f43e
* Async_hooks
* Older experimental async_hooks APIs have been removed. #1cc6b993b9
* Buffer
* Uses of `new Buffer()` and `Buffer()` outside of the `node_modules` directory will now emit a runtime deprecation warning. #9d4ab90117
* `Buffer.isEncoding()` now returns `undefined` for falsy values, including an empty string. #452eed956e
* `Buffer.fill()` will throw if an attempt is made to fill with an empty `Buffer`. #1e802539b2
* Child Process
* Undefined properties of env are ignored. #38ee25e2e2, #85739b6c5b
* Console
* The `console.table()` method has been added. #97ace04492
* Crypto
* The `crypto.createCipher()` and `crypto.createDecipher()` methods have been deprecated. Please use `crypto.createCipheriv()` and `crypto.createDecipheriv()` instead. #81f88e30dd
* The `decipher.finaltol()` method has been deprecated. #19f3927d92
* The `crypto.DEFAULT_ENCODING` property has been deprecated. #6035beea93
* The `ECDH.convertKey()` method has been added. #f2e02883e7
* The `crypto.fips` property has been deprecated. #6e7992e8b8
* Dependencies
* V8 has been updated to 6.6. #9daebb48d6
* OpenSSL has been updated to 1.1.0h. #66cb29e646
* EventEmitter
* The `EventEmitter.prototype.off()` method has been added as an alias for `EventEmitter.prototype.removeListener()`. #3bb6f07d52
* File System
* The `fs.promises` API provides experimental promisified versions of the `fs` functions. #329fc78e49
* Invalid path errors are now thrown synchronously. #d8f73385e2
* The `fs.readFile()` method now partitions reads to avoid thread pool exhaustion. #67a4ce1c6e
* HTTP
* Processing of HTTP Status codes `100`, `102-199` has been improved. #baf8495078
* Multi-byte characters in URL paths are now forbidden. #b961d9fd83
* N-API
* The n-api is no longer experimental. #cd7d7b15c1
* Net
* The `'close'` event will be emitted after `'end'`. #9b7a6914a7
* Perf_hooks
* The `PerformanceObserver` class is now an `AsyncResource` and can be monitored using `async_hooks`. #009e41826f
* Trace events are now emitted for performance events. #9e509b622b
* The `performance` API has been simplified. #2ec6995555
* Performance milestone marks will be emitted as trace events. #96cb4fb795
* Process
* Using non-string values for `process.env` is deprecated. #5826fe4e79
* The `process.assert()` method is deprecated. #703e37cf3f
* REPL
* REPL now experimentally supports top-level await when using the `--experimental-repl-await` flag. #eeab7bc068
* The previously deprecated "magic mode" has been removed. #4893f70d12
* The previously deprecated `NODE_REPL_HISTORY_FILE` environment variable has been removed. #60c9ad7979
* Proxy objects are shown as Proxy objects when inspected. #90a43906ab
* Streams
* The `'readable'` event is now always deferred with nextTick. #1e0f3315c7
* A new `pipeline()` method has been provided for building end-to-data stream pipelines. #a5cf3feaf1
* Experimental support for async for-await has been added to `stream.Readable`. #61b4d60c5d
* Timers
* The `enroll()` and `unenroll()` methods have been deprecated. #68783ae0b8
* TLS
* The `tls.convertNONProtocols()` method has been deprecated. #9204a0db6e
* Support for NPN (next protocol negotiation) has been dropped. #5bfbe5ceae
* The `ecdhCurve` default is now `'auto'`. #af78840b19
* Trace Events
* A new `trace_events` top-level module allows trace event categories to be enabled/disabld at runtime. #da5d818a54
* URL
* The WHATWG URL API is now a global. #312414662b
* Util
* `util.types.is[…]` type checks have been added. #b20af8088a
* Support for bigint formatting has been added to `util.inspect()`. #39dc947409
Removes the requirement to use `--trace-events-enabled` to enable
trace events. Tracing is enabled automatically if there are any
enabled categories.
Adds a new `trace_events` module with an API for enabling/disabling
trace events at runtime without a command line flag.
```js
const trace_events = require('trace_events');
const categories = [ 'node.perf', 'node.async_hooks' ];
const tracing = trace_events.createTracing({ categories });
tracing.enable();
// do stuff
tracing.disable();
```
Multiple `Tracing` objects may exist and be enabled at any point
in time. The enabled trace event categories is the union of all
enabled `Tracing` objects and the `--trace-event-categories`
flag.
PR-URL: https://github.com/nodejs/node/pull/19803
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Allow the user to specify the filepath for the trace_events log file
using a template string.
PR-URL: https://github.com/nodejs/node/pull/18480
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Adds the `node.perf.usertiming` trace events category for recording
usertiming marks and measures (e.g. `perf_hooks.performance.mark()`)
in the trace events timeline.
Adds the `node.perf.function` trace events category for recording
`perf_hooks.performance.timerify()` durations in the trace events
timeline.
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>
Override the V8 TracingController to provide uv_hrtime based
timestamps. This allows tracing timestamps to be comparable with
process.hrtime timestamps.
Fixes: https://github.com/nodejs/node/issues/17349
PR-URL: https://github.com/nodejs/node/pull/18196
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Andreas Madsen <amwebdk@gmail.com>
Add missing "introduced_in" comments for alternative version links.
PR-URL: https://github.com/nodejs/node/pull/16741
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
This will allow trace event to record timing information for all
asynchronous operations that are observed by async_hooks.
PR-URL: https://github.com/nodejs/node/pull/15538
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
This commit adds support for trace-event tracing to Node.js. It provides
a mechanism to centralize tracing information generated by V8, Node
core, and userspace code. It includes:
- A trace writer responsible for serializing traces and cycling the
output files so that no individual file becomes to large.
- A buffer for aggregating traces to allow for batched flushes.
- An agent which initializes the tracing controller and ensures that
trace serialization is done on a separate thread.
- A set of macros for generating trace events.
- Tests and documentation.
Author: Raymond Kang <raymondksi@gmail.com>
Author: Kelvin Jin <kelvinjin@google.com>
Author: Matthew Loring <mattloring@google.com>
Author: Jason Ginchereau <jasongin@microsoft.com>
PR-URL: https://github.com/nodejs/node/pull/9304
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Josh Gavant <josh.gavant@outlook.com>
