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2021-03-30, Version 12.22.0 'Erbium' (LTS)
Notable changes The legacy HTTP parser is runtime deprecated: - The legacy HTTP parser, selected by the `--http-parser=legacy` command line option, is deprecated with the pending End-of-Life of Node.js 10.x (where it is the only HTTP parser implementation provided) at the end of April 2021. It will now warn on use but otherwise continue to function and may be removed in a future Node.js 12.x release. - The default HTTP parser based on llhttp is not affected. By default it is stricter than the now deprecated legacy HTTP parser. If interoperability with HTTP implementations that send invalid HTTP headers is required, the HTTP parser can be started in a less secure mode with the `--insecure-http-parser` command line option. ES Modules: - ES Modules are now considered stable. node-api: - Added an experimental API to allow retrieval of the add-on file name. New API's to control code coverage data collection: - `v8.stopCoverage()` and `v8.takeCoverage()` have been added. New API to monitor event loop utilization by Worker threads - `worker.performance.eventLoopUtilization()` has been added. PR-URL: #37797
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‎CHANGELOG.md

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<b><a href="doc/changelogs/CHANGELOG_V12.md#12.21.0">12.21.0</a></b><br/>
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<b><a href="doc/changelogs/CHANGELOG_V12.md#12.22.0">12.22.0</a></b><br/>
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<a href="doc/changelogs/CHANGELOG_V12.md#12.21.0">12.21.0</a><br/>
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<a href="doc/changelogs/CHANGELOG_V12.md#12.20.2">12.20.2</a><br/>
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<a href="doc/changelogs/CHANGELOG_V12.md#12.20.1">12.20.1</a><br/>
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<a href="doc/changelogs/CHANGELOG_V12.md#12.20.0">12.20.0</a><br/>

‎doc/api/cli.md

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<!-- YAML
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- version: v12.22.0
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pr-url: https://github.com/nodejs/node/pull/37603
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description: The legacy HTTP parser will emit a deprecation warning.
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‎doc/api/deprecations.md

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### DEP0131: Legacy HTTP parser
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description: Runtime deprecation.
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- version: v12.3.0

‎doc/api/esm.md

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description: Stabilize modules implementation.
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‎doc/api/n-api.md

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## node_api_get_module_file_name
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> Stability: 1 - Experimental

‎doc/api/v8.md

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## `v8.takeCoverage()`
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## `v8.stopCoverage()`
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‎doc/api/worker_threads.md

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### `worker.performance`
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An object that can be used to query performance information from a worker
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#### `performance.eventLoopUtilization([utilization1[, utilization2]])`
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‎doc/changelogs/CHANGELOG_V12.md

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<a href="#12.22.0">12.22.0</a><br/>
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<a href="#12.21.0">12.21.0</a><br/>
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<a href="#12.20.2">12.20.2</a><br/>
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* [io.js](CHANGELOG_IOJS.md)
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* [Archive](CHANGELOG_ARCHIVE.md)
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<a id="12.22.0"></a>
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## 2021-03-30, Version 12.22.0 'Erbium' (LTS), @richardlau
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### Notable changes
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#### The legacy HTTP parser is runtime deprecated
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The legacy HTTP parser, selected by the `--http-parser=legacy` command line
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option, is deprecated with the pending End-of-Life of Node.js 10.x (where it
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is the only HTTP parser implementation provided) at the end of April 2021. It
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will now warn on use but otherwise continue to function and may be removed in
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a future Node.js 12.x release.
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The default HTTP parser based on llhttp is not affected. By default it is
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stricter than the now deprecated legacy HTTP parser. If interoperability with
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HTTP implementations that send invalid HTTP headers is required, the HTTP
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parser can be started in a less secure mode with the
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[`--insecure-http-parser`](https://nodejs.org/docs/latest-v12.x/api/cli.html#cli_insecure_http_parser)
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command line option.
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Contributed by Beth Griggs [#37603](https://github.com/nodejs/node/pull/37603).
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#### ES Modules
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ES Modules are now considered stable.
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Contributed by Guy Bedford [#35781](https://github.com/nodejs/node/pull/35781)
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#### node-api
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Added an experimental API to allow retrieval of the add-on file name.
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Contributed by Gabriel Schulhof [#37195](https://github.com/nodejs/node/pull/37195).
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#### New API's to control code coverage data collection
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`v8.stopCoverage()` and `v8.takeCoverage()` have been added.
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Contributed by Joyee Cheung [#33807](https://github.com/nodejs/node/pull/33807).
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#### New API to monitor event loop utilization by Worker threads
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`worker.performance.eventLoopUtilization()` has been added.
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Contributed by Trevor Norris [#35664](https://github.com/nodejs/node/pull/35664).
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### Commits
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* [[`1872625990`](https://github.com/nodejs/node/commit/1872625990)] - **(SEMVER-MINOR)** **deps**: update to cjs-module-lexer@1.1.0 (Guy Bedford) [#37712](https://github.com/nodejs/node/pull/37712)
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* [[`dfa04d9035`](https://github.com/nodejs/node/commit/dfa04d9035)] - **deps**: V8: cherry-pick beebee4f80ff (Peter Marshall) [#37293](https://github.com/nodejs/node/pull/37293)
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* [[`bf8733fe22`](https://github.com/nodejs/node/commit/bf8733fe22)] - **doc**: mark modules implementation as stable (Guy Bedford) [#35781](https://github.com/nodejs/node/pull/35781)
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* [[`0a35d49f56`](https://github.com/nodejs/node/commit/0a35d49f56)] - ***Revert*** "**embedding**: make Stop() stop Workers" (Anna Henningsen) [#32623](https://github.com/nodejs/node/pull/32623)
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* [[`a0b610450a`](https://github.com/nodejs/node/commit/a0b610450a)] - **(SEMVER-MINOR)** **http**: runtime deprecate legacy HTTP parser (Beth Griggs) [#37603](https://github.com/nodejs/node/pull/37603)
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* [[`f5692093d3`](https://github.com/nodejs/node/commit/f5692093d3)] - **(SEMVER-MINOR)** **node-api**: allow retrieval of add-on file name (Gabriel Schulhof) [#37195](https://github.com/nodejs/node/pull/37195)
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* [[`6cef0e3678`](https://github.com/nodejs/node/commit/6cef0e3678)] - **src,test**: add regression test for nested Worker termination (Anna Henningsen) [#32623](https://github.com/nodejs/node/pull/32623)
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* [[`d7a4ccdf09`](https://github.com/nodejs/node/commit/d7a4ccdf09)] - **test**: correct test-worker-eventlooputil (Gerhard Stoebich) [#35891](https://github.com/nodejs/node/pull/35891)
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* [[`0f6d44500c`](https://github.com/nodejs/node/commit/0f6d44500c)] - **test**: add cpu-profiler-crash test (Santiago Gimeno) [#37293](https://github.com/nodejs/node/pull/37293)
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* [[`86f34ee18c`](https://github.com/nodejs/node/commit/86f34ee18c)] - **(SEMVER-MINOR)** **v8**: implement v8.stopCoverage() (Joyee Cheung) [#33807](https://github.com/nodejs/node/pull/33807)
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* [[`8ddea3f16d`](https://github.com/nodejs/node/commit/8ddea3f16d)] - **(SEMVER-MINOR)** **v8**: implement v8.takeCoverage() (Joyee Cheung) [#33807](https://github.com/nodejs/node/pull/33807)
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* [[`eec7542781`](https://github.com/nodejs/node/commit/eec7542781)] - **(SEMVER-MINOR)** **worker**: add eventLoopUtilization() (Trevor Norris) [#35664](https://github.com/nodejs/node/pull/35664)
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<a id="12.21.0"></a>
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## 2021-02-23, Version 12.21.0 'Erbium' (LTS), @richardlau
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‎src/node_version.h

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#define NODE_MINOR_VERSION 22
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#define NODE_PATCH_VERSION 0
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#define NODE_VERSION_IS_RELEASE 1
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#define NODE_STRINGIFY(n) NODE_STRINGIFY_HELPER(n)

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