tailhook

let mut file = try!(File::open(fname).context(fname));
try!(file.read_to_string(&mut buf).context(fname));
try!(buf.parse().context(fname))

tailhook

enum Error {
    Io(io::Error),
    Parse(ParseIntError),
}
// ...
try!(File::open(fname)
    .and_then(|mut f| f.read_to_string(&mut buf))
    .map_err(|e| Error::Io(e, fname.to_path_buf())));
let x: u64 = try!(buf.parse()
    .map_err(|e| Error::Parse(e, fname.to_path_buf())));

tailhook

#[macro_use(quick_error)] extern crate quick_error;

use std::io::{self, stderr, Read, Write};
use std::fs::File;
use std::env;

use std::num::ParseIntError;
use std::path::{Path, PathBuf};

quick_error! {
    #[derive(Debug)]

tailhook

#[macro_use(quick_error)] extern crate quick_error;

use std::io::{self, stderr, Read, Write};
use std::fs::File;
use std::env;
use std::num::ParseIntError;
use std::path::{Path, PathBuf};

use quick_error::ResultExt;

tailhook

#[macro_use(quick_error)] extern crate quick_error;

use std::io::{self, stderr, Read, Write};
use std::fs::File;
use std::env;
use std::num::ParseIntError;
use std::path::{Path, PathBuf};

use quick_error::ResultExt;

tailhook

--- examples/serve.rs	2016-03-29 00:14:50.712643740 +0300
+++ examples/serve_sendfile.rs	2016-04-05 00:13:24.651021841 +0300
@@ -14,7 +14,8 @@
 
 enum Http {
     ReadHeaders,
-    SendResponse,
+    SendingFile { offset: u64 },
+    BodySent,
 }

tailhook

> ~/wrk -t 2 -c 20 -d 60 http://localhost:3000 --latency
Running 1m test @ http://localhost:3000
  2 threads and 20 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     0.87ms   26.71us   1.62ms   94.77%
    Req/Sec    11.44k   279.33    11.71k    93.26%
  Latency Distribution
     50%    0.86ms
     75%    0.87ms
     90%    0.88ms

tailhook

> ~/wrk -t 2 -c 20 -d 60 http://hostname:3000 --latency
Running 1m test @ http://hostname:3000                                     
  2 threads and 20 connections                                                  
  Thread Stats   Avg      Stdev     Max   +/- Stdev                             
    Latency    33.21ms    1.15ms  47.44ms   87.93%                              
    Req/Sec   300.70      9.00   323.00     78.17%                              
  Latency Distribution                                                          
     50%   33.13ms                                                              
     75%   33.60ms                                                              
     90%   34.08ms                                                              

tailhook

> ~/wrk -t 2 -c 20 -d 60 http://hostname:3000 --latency                    
Running 1m test @ http://hostname:3000                                     
  2 threads and 20 connections                                                  
  Thread Stats   Avg      Stdev     Max   +/- Stdev                             
    Latency    18.97ms    5.30ms 237.70ms   96.60%                              
    Req/Sec   534.52     23.46     1.02k    80.10%                              
  Latency Distribution                                                          
     50%   18.70ms                                                              
     75%   19.40ms                                                              
     90%   21.02ms                                                              

tailhook

> ~/wrk -t 2 -c 20 -d 60 http://hostname:3000 --latency
Running 1m test @ http://hostname:3000
  2 threads and 20 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   451.75us   73.89us   2.42ms   78.56%
    Req/Sec    18.19k     1.54k   28.56k    83.44%
  Latency Distribution
     50%  441.00us
     75%  488.00us
     90%  545.00us