io.js 2.1.0 发布，此版本值得关注的改进：
crypto: Diffie-Hellman key exchange (DHE) parameters (
'dhparams') must now be 1024 bits or longer or an error will be thrown. #1739.node: A new
--trace-sync-iocommand line flag will print a warning and a stack trace whenever a synchronous API is used. #1707.node: To allow for chaining of methods, the
setTimeout(),setKeepAlive(),setNoDelay(),ref()andunref()methods used in'net','dgram','http','https'and'tls'now return the current instance instead ofundefined(Roman Reiss & Evan Lucas) #1699 #1768 #1779.npm: Upgraded to v2.10.1, release notes can be found in https://github.com/npm/npm/releases/tag/v2.10.1 and https://github.com/npm/npm/releases/tag/v2.10.0.
util: A significant speed-up (in the order of 35%) for the common-case of a single string argument to
util.format(), used byconsole.log()(Сковорода Никита Андреевич) #1749.
此版本现已提供下载：https://github.com/nodejs/io.js/archive/v2.1.0.zip。
更多内容请看更新日志。
IO.js 是为 V8 引擎编写的基于事件 IO 的实现。
构建要求：
* `gcc` and `g++` 4.8 or newer, or
* `clang` and `clang++` 3.3 or newer
* Python 2.6 or 2.7
* GNU Make 3.81 or newer
* libexecinfo (FreeBSD and OpenBSD only)
这样就不用这么多分支了~~~
引用来自“jonny123”的评论
啥时候合并啊