The mio-based framework for rust for doing I/O in simple and composable way.

Features:

• Based on hierarchical state machine concept
• Ownership semantics for state machines allows to write without memory/resource leaks
• Easy to combine multiple libraries into single mio event loop

• Asynchronous IO in Rust (random design notes about this library)

Just few micro-benchmarks to show that framework has a decent peformance.

The performance on the few years old laptop (i7-3517U CPU @ 1.90GHz):

> wrk -t2 -c 400 http://localhost:8888/
Running 10s test @ http://localhost:8888/
  2 threads and 400 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    11.19ms   18.03ms 627.44ms   99.54%
    Req/Sec    19.66k     1.76k   21.93k    81.00%
  391170 requests in 10.01s, 32.83MB read
Requests/sec:  39071.42
Transfer/sec:      3.28MB

Performance on newer desktop class CPU (i7-4790K CPU @ 4.00GHz):

> ./wrk -t 2 -c 400 http://127.0.0.1:8888
Running 10s test @ http://127.0.0.1:8888
  2 threads and 400 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     2.24ms    1.56ms 126.94ms   99.91%
    Req/Sec    91.35k     2.27k   93.76k    98.00%
  1818133 requests in 10.00s, 152.58MB read
Requests/sec: 181781.96
Transfer/sec:     15.26MB

Note: both benchmarks are run on single threaded server.

The bencmarks are too early (not a full implementation of HTTP), so no comparison bencmarks listed here.