H2O 1.4.0 发布，相比之前的1.3.1版本有一些更新和 bug 修复，主要如下：
Support for the PROXY protocol
Support for cache-based and ticket-based TLS session resumption using Memcached (and forward secrecy)
features:
cache-based session resumption using memcached
automatic rollover of master secret used for ticket-based resumption
synchronization of master secrets that rollover, using memcached
directive to configure the cipher used for encrypting tickets (with default being aes-256-cbc)
H2O 是一个经过优化的 HTTP 服务器实现，可用于一个标准的独立服务器或者是一个 HTTP 服务器开发包。
支持的协议有：
HTTP/1.0 (http and https)
HTTP/1.1 (http and https)
Websocket (RFC6455, both ws and wss)
HTTP/2.0 (draft 14, via Upgrade, NPN, ALPN)
依赖包：
OpenSSL (mandatory)
libyaml (optional; required when building the server)
libuv 1.0.0 (optional; required when using h2o as a library)
wslay (optional; required if you need support for websocket)
实际测试发现 H2O 的性能是 Nginx 的两倍左右 (ab -c 500 -n 100000 -k)。
软件详情：http://blog.kazuhooku.com/2015/07/h2o-version-140-released-with.html
来自:开源中国社区
