io.js 1.5.1 发布，此版本现已提供下载：https://github.com/iojs/io.js/archive/v1.5.1.zip。
更新内容如下：
值得关注的改进
tls：解决了部分报告的 TLS 内存泄漏问题 #1075.
http：修复了joyent/node#9348 和 npm/npm#7349 的已知问题 #1103
已知问题
Possible remaining TLS-related memory leak(s), details at #1075.
Windows still reports some minor test failures and we are continuing to address all of these as a priority. See #1005.
Surrogate pair in REPL can freeze terminal #690
Not possible to build io.js as a static library #686
process.send() is not synchronous as the docs suggest, a regression introduced in 1.0.2, see #760 and fix in #774
Calling dns.setServers() while a DNS query is in progress can cause the process to crash on a failed assertion #894
更多改进内容请看更新日志。
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)
软件详情：https://github.com/iojs/io.js/blob/v1.x/CHANGELOG.md
来自:开源中国社区
