## 2015-09-17, Version 4.1.0 (Stable), @Fishrock123
### Notable changes
* **buffer**:
- Buffers are now created in JavaScript, rather than C++. This increases the speed of buffer creation (Trevor Norris) [#2866](https://github.com/nodejs/node/pull/2866).
- `fs.utimes()` now properly converts numeric strings, `NaN`, and `Infinity` (Yazhong Liu) [#2387](https://github.com/nodejs/node/pull/2387).
- `fs.WriteStream` now implements `_writev`, allowing for super-fast bulk writes (Ron Korving) [#2167](https://github.com/nodejs/node/pull/2167).
* **http**: Fixed an issue with certain `write()` sizes causing errors when using `http.request()` (Fedor Indutny) [#2824](https://github.com/nodejs/node/pull/2824).
* **npm**: Upgrade to version 2.14.3, see https://github.com/npm/npm/releases/tag/v2.14.3 for more details (Kat Marchán) [#2822](https://github.com/nodejs/node/pull/2822).
* **src**: V8 cpu profiling no longer erroneously shows idle time (Oleksandr Chekhovskyi) [#2324](https://github.com/nodejs/node/pull/2324).
* **timers**: `#ref()` and `#unref()` now return the timer they belong to (Sam Roberts) [#2905](https://github.com/nodejs/node/pull/2905).
* **v8**: Lateral upgrade to 4.5.103.33 from 4.5.103.30, contains minor fixes (Ali Ijaz Sheikh) [#2870](https://github.com/nodejs/node/pull/2870).
- This fixes a previously known bug where some computed object shorthand properties did not work correctly ([#2507](https://github.com/nodejs/node/issues/2507)).
### Known issues
See https://github.com/nodejs/node/labels/confirmed-bug for complete and current list of known issues.
* Some problems with unreferenced timers running during `beforeExit` are still to be resolved. See [#1264](https://github.com/nodejs/node/issues/1264).
* Surrogate pair in REPL can freeze terminal. [#690](https://github.com/nodejs/node/issues/690)
* Calling `dns.setServers()` while a DNS query is in progress can cause the process to crash on a failed assertion. [#894](https://github.com/nodejs/node/issues/894)
* `url.resolve` may transfer the auth portion of the url when resolving between two full hosts, see [#1435](https://github.com/nodejs/node/issues/1435).
### Commits
* [[`b1abe812cd`](https://github.com/nodejs/node/commit/b1abe812cd)] - Working on 4.0.1 (Rod Vagg)
* [[`f9f8378853`](https://github.com/nodejs/node/commit/f9f8378853)] - 2015-09-08, Version 4.0.0 (Stable) Release (Rod Vagg)
* [[`9683e5df51`](https://github.com/nodejs/node/commit/9683e5df51)] - **bindings**: close after reading module struct (Fedor Indutny) [#2792](https://github.com/nodejs/node/pull/2792)
* [[`43397b204e`](https://github.com/nodejs/node/commit/43397b204e)] - **(SEMVER-MINOR)** **build**: Updates to enable AIX support (Michael Dawson) [#2364](https://github.com/nodejs/node/pull/2364)
* [[`e35b1fd610`](https://github.com/nodejs/node/commit/e35b1fd610)] - **build**: clean up the generated tap file (Sakthipriyan Vairamani) [#2837](https://github.com/nodejs/node/pull/2837)
* [[`bf42cc8dba`](https://github.com/nodejs/node/commit/bf42cc8dba)] - **doc**: process exit event is not guaranteed to fire (Rich Trott) [#2861](https://github.com/nodejs/node/pull/2861)
* [[`bb0f869f67`](https://github.com/nodejs/node/commit/bb0f869f67)] - **doc**: remove incorrect reference to TCP in net docs (Sam Roberts) [#2903](https://github.com/nodejs/node/pull/2903)
* [[`a7bd897273`](https://github.com/nodejs/node/commit/a7bd897273)] - **doc**: rename from iojs(1) to node(1) in benchmarks (Dmitry Vasilyev) [#2884](https://github.com/nodejs/node/pull/2884)
* [[`4d1ae26196`](https://github.com/nodejs/node/commit/4d1ae26196)] - **doc**: add tunniclm as a collaborator (Mike Tunnicliffe) [#2826](https://github.com/nodejs/node/pull/2826)
* [[`2d77d03643`](https://github.com/nodejs/node/commit/2d77d03643)] - **doc**: fix two doc errors in stream and process (Jeremiah Senkpiel) [#2549](https://github.com/nodejs/node/pull/2549)
* [[`cd1297fb57`](https://github.com/nodejs/node/commit/cd1297fb57)] - **doc**: use "Calls" over "Executes" for consistency (Minwoo Jung) [#2800](https://github.com/nodejs/node/pull/2800)
* [[`d664b95581`](https://github.com/nodejs/node/commit/d664b95581)] - **doc**: use US English for consistency (Anne-Gaelle Colom) [#2784](https://github.com/nodejs/node/pull/2784)
* [[`82ba1839fb`](https://github.com/nodejs/node/commit/82ba1839fb)] - **doc**: use 3rd person singular for consistency (Anne-Gaelle Colom) [#2765](https://github.com/nodejs/node/pull/2765)
* [[`432cce6e95`](https://github.com/nodejs/node/commit/432cce6e95)] - **doc**: describe process API for IPC (Sam Roberts) [#1978](https://github.com/nodejs/node/pull/1978)
* [[`ea15d71c16`](https://github.com/nodejs/node/commit/ea15d71c16)] - **http_server**: fix resume after socket close (Fedor Indutny) [#2824](https://github.com/nodejs/node/pull/2824)
* [[`8e5843405b`](https://github.com/nodejs/node/commit/8e5843405b)] - **src**: null env_ field from constructor (Trevor Norris) [#2913](https://github.com/nodejs/node/pull/2913)
* [[`0a5f80a11f`](https://github.com/nodejs/node/commit/0a5f80a11f)] - **src**: use subarray() in Buffer#slice() for speedup (Karl Skomski) [#2777](https://github.com/nodejs/node/pull/2777)
* [[`57707e2490`](https://github.com/nodejs/node/commit/57707e2490)] - **src**: use ZCtxt as a source for v8::Isolates (Roman Klauke) [#2547](https://github.com/nodejs/node/pull/2547)
* [[`648c003e14`](https://github.com/nodejs/node/commit/648c003e14)] - **test**: use tmp directory in chdir test (Sakthipriyan Vairamani) [#2589](https://github.com/nodejs/node/pull/2589)
* [[`52019a1b21`](https://github.com/nodejs/node/commit/52019a1b21)] - **test**: fix default value for additional param (Sakthipriyan Vairamani) [#2553](https://github.com/nodejs/node/pull/2553)
* [[`5df5d0423a`](https://github.com/nodejs/node/commit/5df5d0423a)] - **test**: remove disabled test (Rich Trott) [#2841](https://github.com/nodejs/node/pull/2841)
* [[`9e5f0995bd`](https://github.com/nodejs/node/commit/9e5f0995bd)] - **test**: split up internet dns tests (Rich Trott) [#2802](https://github.com/nodejs/node/pull/2802)
* [[`ac004b8555`](https://github.com/nodejs/node/commit/ac004b8555)] - **tools**: remove hyphen in TAP result (Sakthipriyan Vairamani) [#2718](https://github.com/nodejs/node/pull/2718)
* [[`ba47511976`](https://github.com/nodejs/node/commit/ba47511976)] - **tsc**: adjust TSC membership for IBM+StrongLoop (James M Snell) [#2858](https://github.com/nodejs/node/pull/2858)