- The prefix used before the version number on `npm version` is now configurable via `tag-version-prefix` (@kkragenbrink) [npm/npm#8014](https://github.com/npm/npm/issues/8014)
* **os**: `os.tmpdir()` is now cross-platform consistent and will no longer returns a path with a trailling slash on any platform (Christian Tellnes) [#747](https://github.com/iojs/io.js/pull/747)
* **process**:
- - `process.nextTick()` performance has been improved by between 2-42% across the benchmark suite, notable because this is heavily used across core (Brian White) [#1548](https://github.com/iojs/io.js/pull/1548)
+ - `process.nextTick()` performance has been improved by between 2-42% across the benchmark suite, notable because this is heavily used across core (Brian White) [#1571](https://github.com/iojs/io.js/pull/1571)
- New `process.geteuid()`, `process.seteuid(id)`, `process.getegid()` and `process.setegid(id)` methods allow you to get and set effective UID and GID of the process (Evan Lucas) [#1536](https://github.com/iojs/io.js/pull/1536)
* **repl**:
- REPL history can be persisted across sessions if the `NODE_REPL_HISTORY_FILE` environment variable is set to a user accessible file, `NODE_REPL_HISTORY_SIZE` can set the maximum history size and defaults to `1000` (Chris Dickinson) [#1513](https://github.com/iojs/io.js/pull/1513)