2019年，Golang开始吊打Java性能了！！！

最近要同事debug性能，不经意间发现现在Golang性能开始吊打Java了！！！感觉Go发展神速！！ 之前Go和Java基本是平手，甚至还有较大差距，请见https://www.cnblogs.com/sunsky303/p/6506663.html。借此机会对比了下，Java/Go http server最近的性能，毕竟这是后端同学最关心的问题之一！！

java 10 vs Golang1.12， Google上最快的2个http server性能PK, 压测10次，取平均值。

Java

import org.rapidoid.buffer.Buf;
import org.rapidoid.http.AbstractHttpServer;
import org.rapidoid.http.HttpStatus;
import org.rapidoid.http.MediaType;
import org.rapidoid.net.abstracts.Channel;
import org.rapidoid.net.impl.RapidoidHelper;


public class RapidoidHttpFast extends AbstractHttpServer
{
 private static final int port = 8080;
 private static final byte HOME[] = "/".getBytes();
 private static final byte HELLO_WORLD[] = "Hello World".getBytes();

 @Override
 protected HttpStatus handle(Channel ctx, Buf buf, RapidoidHelper req)
 {
  if (req.isGet.value && matches(buf, req.path, HOME))
  {
   return ok(ctx, req.isKeepAlive.value, HELLO_WORLD, MediaType.TEXT_PLAIN);
  }

  return HttpStatus.NOT_FOUND;
 }

 public static void main(String[] args) throws Exception
 {
  new RapidoidHttpFast().listen(port);
 }
}

sysctl -n machdep.cpu.brand_string ;java --version ;java -cp ".:/Users/wuqj/Downloads/jar_files/*" HelloWorldExample
Intel(R) Core(TM) i5-4278U CPU @ 2.60GHz
java 10 2018-03-20
Java(TM) SE Runtime Environment 18.3 (build 10+46)
Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10+46, mixed mode)
19:50:33.353 [main] INFO o.r.config.RapidoidInitializer - Starting Rapidoid v5.5.5, built on 2018-05-27 15:45 UTC
19:50:33.358 [main] INFO o.r.config.RapidoidInitializer - System info | os = Mac OS X | java = 10 | process = 17435@sun-pro.local | max memory = 2048 MB | dir = /labs/java
19:50:33.639 [main] INFO org.rapidoid.env.Environment - No profiles were specified, activating 'default' profile
19:50:33.645 [main] INFO org.rapidoid.env.Environment - No production/dev/test mode was configured, inferring mode | mode = DEV
19:50:33.645 [main] INFO org.rapidoid.env.Environment - Initialized environment | mode = DEV | profiles = [default, dev]
19:50:33.932 [main] INFO org.rapidoid.config.ConfigImpl - Loaded configuration | namespace = config | files = [built-in-config.yml, built-in-config-default.yml, built-in-config-dev.yml]
19:50:34.065 [main] INFO o.rapidoid.http.impl.HttpRoutesImpl - GET / | setup = main | roles = [] | transaction = NONE | mvc = false | cacheTTL = 0
19:50:34.072 [main] INFO org.rapidoid.setup.App - Inferred application root | main = HelloWorldExample | package =
19:50:34.080 [main] INFO org.rapidoid.setup.WatchForChanges - Watching classpath for changes... | classpath = [/labs/java/.]
19:50:34.175 [server] INFO o.r.net.impl.RapidoidServerLoop - Starting server | address = 0.0.0.0 | port = 8080 | I/O workers = 4 | sync = true | accept = non-blocking
19:50:34.399 [main] INFO org.rapidoid.setup.Setup - Server has started | setup = main | home = http://localhost:8080
19:50:34.400 [main] INFO org.rapidoid.setup.Setup - Static resources will be served from the following locations | setup = main | locations = [static, default/static]

ab -c100 -n100000 -k 'http://127.0.0.1:8080/'
This is ApacheBench, Version 2.3 <$Revision: 1826891 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 127.0.0.1 (be patient)
Completed 10000 requests
Completed 20000 requests
Completed 30000 requests
Completed 40000 requests
Completed 50000 requests
Completed 60000 requests
Completed 70000 requests
Completed 80000 requests
Completed 90000 requests
Completed 100000 requests
Finished 100000 requests


Server Software:        Rapidoid
Server Hostname:        127.0.0.1
Server Port:            8080

Document Path:          /
Document Length:        11 bytes

Concurrency Level:      100
Time taken for tests:   2.872 seconds
Complete requests:      100000
Failed requests:        0
Keep-Alive requests:    100000
Total transferred:      17000000 bytes
HTML transferred:       1100000 bytes
Requests per second:    34822.08 [#/sec] (mean)
Time per request:       2.872 [ms] (mean)
Time per request:       0.029 [ms] (mean, across all concurrent requests)
Transfer rate:          5781.01 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.2      0      11
Processing:     0    3   1.6      2      27
Waiting:        0    3   1.6      2      27
Total:          0    3   1.6      2      27

Percentage of the requests served within a certain time (ms)
  50%      2
  66%      3
  75%      3
  80%      3
  90%      5
  95%      6
  98%      8
  99%      9
 100%     27 (longest request)

Golang

package main

import (
    "flag"
    "fmt"
    "github.com/valyala/fasthttp"
    "log"
)

var (
    addr     = flag.String("addr", ":8080", "TCP address to listen to")
    compress = flag.Bool("compress", false, "Whether to enable transparent response compression")
)

func main() {
    flag.Parse()
    h := requestHandler

    if err := fasthttp.ListenAndServe(*addr, h); err != nil {
        log.Fatalf("Error in ListenAndServe: %s", err)
    }
}

func requestHandler(ctx *fasthttp.RequestCtx) {
    fmt.Fprintf(ctx, "Hello world")
}

 sysctl -n machdep.cpu.brand_string ;go version ; go run ../fasthttp/helloworldserver.go
Intel(R) Core(TM) i5-4278U CPU @ 2.60GHz
go version go1.12.4 darwin/amd64

ab -c100 -n100000 -k 'http://127.0.0.1:8080/'
This is ApacheBench, Version 2.3 <$Revision: 1826891 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 127.0.0.1 (be patient)
Completed 10000 requests
Completed 20000 requests
Completed 30000 requests
Completed 40000 requests
Completed 50000 requests
Completed 60000 requests
Completed 70000 requests
Completed 80000 requests
Completed 90000 requests
Completed 100000 requests
Finished 100000 requests


Server Software:        fasthttp
Server Hostname:        127.0.0.1
Server Port:            8080

Document Path:          /
Document Length:        11 bytes

Concurrency Level:      100
Time taken for tests:   2.282 seconds
Complete requests:      100000
Failed requests:        0
Keep-Alive requests:    100000
Total transferred:      17000000 bytes
HTML transferred:       1100000 bytes
Requests per second:    43819.46 [#/sec] (mean)
Time per request:       2.282 [ms] (mean)
Time per request:       0.023 [ms] (mean, across all concurrent requests)
Transfer rate:          7274.72 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.1      0       7
Processing:     0    2   1.8      2     138
Waiting:        0    2   1.8      2     138
Total:          0    2   1.8      2     140

Percentage of the requests served within a certain time (ms)
  50%      2
  66%      2
  75%      2
  80%      3
  90%      4
  95%      4
  98%      6
  99%      7
 100%    140 (longest request)

QPS上 Go 43819.46吊打 Java 34822.08！！！

看来走Golang路线没错。 后续我有空会分析下原理。