Java和Clojure开源的 HTTP 客户端

• JDK’s URLConnection uses traditional thread-blocking I/O.
• Apache HTTP Client uses traditional thread-blocking I/O with thread-pools.
• Apache Async HTTP Client uses NIO.
• Jersey is a ReST client/server framework; the client API can use several HTTP client backends including URLConnection and Apache HTTP Client.
• OkHttp uses traditional thread-blocking I/O with thread-pools.
• Retrofit turns your HTTP API into a Java interface and can use several HTTP client backends including Apache HTTP Client.
• Grizzly is network framework with low-level HTTP support; it was using NIO but it switched to AIO .
• Netty is a network framework with HTTP support (low-level), multi-transport, includes NIO and native (the latter uses epoll on Linux).
• Jetty Async HTTP Client uses NIO.
• Async HTTP Client wraps either Netty, Grizzly or JDK’s HTTP support.
• clj-http wraps the Apache HTTP Client.
• http-kit is an async subset of clj-http implemented partially in Java directly on top of NIO.
• http async client wraps the Async HTTP Client for Java.

以下是负载测试的结果：