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README.md
46
README.md
@ -112,61 +112,51 @@ TCP是为流量设计的（每秒内可以传输多少KB的数据），讲究的
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kcp->rx_minrto = 10;
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```
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# 更多内容
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# 文档索引
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协议的使用和配置都是很简单的，大部分情况看完上面的内容基本可以使用了。如果你需要进一步进行精细的控制，比如改变 KCP的内存分配器，或者你需要更有效的大规模调度 KCP链接（比如 3500个以上），或者如何更好的同 TCP结合，那么可以继续延伸阅读：
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- [Wiki Home](https://github.com/skywind3000/kcp/wiki)
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- [KCP 最佳实践](https://github.com/skywind3000/kcp/wiki/KCP-Best-Practice)
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- [同现有TCP服务器集成](https://github.com/skywind3000/kcp/wiki/Cooperate-With-Tcp-Server)
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- [传输数据加密](https://github.com/skywind3000/kcp/wiki/Network-Encryption)
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- [应用层流量控制](https://github.com/skywind3000/kcp/wiki/Flow-Control-for-Users)
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- [Wiki Home](https://github.com/skywind3000/kcp/wiki)
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- [KCP 最佳实践](https://github.com/skywind3000/kcp/wiki/KCP-Best-Practice)
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- [同现有TCP服务器集成](https://github.com/skywind3000/kcp/wiki/Cooperate-With-Tcp-Server)
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- [传输数据加密](https://github.com/skywind3000/kcp/wiki/Network-Encryption)
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- [应用层流量控制](https://github.com/skywind3000/kcp/wiki/Flow-Control-for-Users)
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- [性能评测](https://github.com/skywind3000/kcp/wiki/KCP-Benchmark)
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# 相关应用
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- [dog-tunnel](https://github.com/vzex/dog-tunnel): GO开发的网络隧道，使用 KCP极大的改进了传输速度，并移植了一份 GO版本 KCP
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- [lua-kcp](https://github.com/linxiaolong/lua-kcp)：KCP的 Lua扩展，用于 Lua服务器
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- [lua-kcp](https://github.com/linxiaolong/lua-kcp)：KCP的 Lua扩展，用于 Lua服务器
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- [asio-kcp](https://github.com/libinzhangyuan/asio_kcp): 使用 KCP的完整 UDP网络库，完整实现了基于 UDP的链接状态管理，会话控制，KCP协议调度等
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# 性能比较
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# 协议比较
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如果不丢包那么 KCP和 TCP性能差不多，KCP不会有任何优势，但是网络会卡，造成卡的原因就是丢包和抖动，有同学在内网这样好的环境下没有用任何丢包模拟直接跑，跑出来的数据是差不多的，但是放到公网上，放到3G/4G网络情况下，差距就很明显了，公网在高峰期有平均接近10%的丢包，wifi/3g/4g下更糟糕，这正是造成各种网络卡顿的元凶。
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感谢 [asio-kcp](https://github.com/libinzhangyuan/asio_kcp) 的作者 [zhangyuan](https://github.com/libinzhangyuan) 对 KCP 与 enet, udt做过的一次横向评测，结论如下：
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- ASIO-KCP has good performace in wifi and phone network(3G, 4G).
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- ASIO-KCP **has good performace in wifi and phone network(3G, 4G)**.
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- Extra using 20% ~ 50% network flow for speed improvement.
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- The kcp is the first choice for realtime pvp game.
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- The lag is less than 1 second when network lag happen. 3 times better than enet when lag happen.
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- The kcp is the **first choice for realtime pvp game**.
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- The lag is less than 1 second when network lag happen. **3 times better than enet** when lag happen.
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- The enet is a good choice if your game allow 2 second lag.
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- UDT is a bad idea. It always sink into badly situation of more than serval seconds lag. And the recovery is not expected.
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- **UDT is a bad idea**. It always sink into badly situation of more than serval seconds lag. And the recovery is not expected.
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- enet has the problem of lack of doc. And it has lots of functions that you may intrest.
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kcp's doc is chinese.
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Good thing is the function detail which is writen in code is english. And you can use asio_kcp which is a good wrap.
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- kcp's doc is chinese. Good thing is the function detail which is writen in code is english. And you can use asio_kcp which is a good wrap.
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- The kcp is a simple thing. You will write more code if you want more feature.
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- UDT has a perfect doc. UDT may has more bug than others as I feeling.
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具体见：[横向比较](https://github.com/libinzhangyuan/reliable_udp_bench_mark/blob/master/bench_mark.md) 和 [这里](https://github.com/skywind3000/kcp/wiki/KCP-Benchmark)。截取一段在网络糟糕时，asio-kcp/enet的延迟数据：
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具体见：[横向比较](https://github.com/libinzhangyuan/reliable_udp_bench_mark) 和 [评测数据](https://github.com/skywind3000/kcp/wiki/KCP-Benchmark)，为犹豫选择的人提供了更多指引。
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```cpp
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worst network lag happen:
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asio: 10:51.21
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291 295 269 268 231 195 249 230 225 204
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enet: 10:51.21
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1563 1520 1470 1482 1438 1454 1412 1637 1588 1540
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```
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我当年主要测试了 KCP和 TCP/UDT的比较，扫了一眼 libenet觉得协议实现中规中矩，缺乏很多现代传输协议的技术，所以并没有详细测试。而 asio-kcp的作者同时给出了KCP/enet/udt三者的详细比较，为更多犹豫选择使用那一套的人提供了更多指引。
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# 欢迎捐赠
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欢迎使用支付宝手扫描上面的二维码，对该项目进行捐赠。捐赠款项将用于改进 KCP性能以及
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后续持续优化。
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欢迎使用支付宝手扫描上面的二维码，对该项目进行捐赠。捐赠款项将用于持续优化 KCP协议以及完善文档。
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欢迎关注
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