Compare image downloader speed in Go, python and php.

picture-grabber.go

package main

import (
    "http"
    "io/ioutil"
    "fmt"
    "os"
)

//var (
//    ErrNotImage = os.NewError("response content type bukan gambar")
//)

func main(){
    for i := 1; i <= 100; i++ {
        err := Download(fmt.Sprintf("http://localhost/1.jpg?nocache=%d", i), fmt.Sprintf("/tmp/%d.jpg", i))
        if err != nil {
            panic(err)
        }
    }
    fmt.Printf("done\n")
}

func Download(url, fileName string) (os.Error) {
    content, err := GetImage(url)
    if err != nil {
        return  err
    }
    file, err := os.Create(fileName)
    if err != nil {
        return err
    }
    defer file.Close()
    file.Write(content)
    return nil
}

func GetImage(url string) ([]byte, os.Error) {
    resp, err := http.Get(url)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()
    //contentType := resp.Header.Get("content-type")
    //if contentType[0:5] != "image" {
    //    return []uint8("bukan gambar"), ErrNotImage
    //}
    content, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        return nil, err
    }
    return content, nil
}

picture-grabber.php

<?php
for ($i = 1; $i <= 100; $i++){
    $content = file_get_contents('http://localhost/1.jpg?nocache='.$i);
    $fp = fopen('/tmp/'.$i.'.jpg', 'wb');
    fwrite($fp, $content);
    fclose($fp);
}
echo "done";

picture-grabber.py

#!/usr/bin/python
import urllib2
import shutil

for i in range(100):
    content = urllib2.urlopen(urllib2.Request('http://localhost/1.jpg?nocache=%d' % i)) 
    with open('/tmp/%d.jpg' % i, 'wb') as fp: 
        shutil.copyfileobj(content, fp) 
    content.close()

print "done"

result.md

Prerequisite

OS: Linux Ubuntu 11.10
Arch: x86_64
go rev: c1702f36df03 (release-branch.r60) release/release.r60.3
WebServer to serve image: Nginx

Go

abdilah@abdilah-komputer:/opt/workspace/trygo$ 6g picture-grabber.go && 6l -o picture-grabber-bin picture-grabber.6g
abdilah@abdilah-komputer:/opt/workspace/trygo$ time ./picture-grabber-bin 
done

real	0m0.102s
user	0m0.068s
sys	0m0.024s
abdilah@abdilah-komputer:/opt/workspace/trygo$ time ./picture-grabber-bin 
done

real	0m0.111s
user	0m0.036s
sys	0m0.052s
abdilah@abdilah-komputer:/opt/workspace/trygo$ time ./picture-grabber-bin 
done

real	0m0.105s
user	0m0.068s
sys	0m0.028s

PHP

abdilah@abdilah-komputer:/opt/workspace/trygo$ time php ./picture-grabber.php 
done
real	0m0.120s
user	0m0.040s
sys	0m0.032s
abdilah@abdilah-komputer:/opt/workspace/trygo$ time php ./picture-grabber.php 
done
real	0m0.124s
user	0m0.048s
sys	        0m0.056s
abdilah@abdilah-komputer:/opt/workspace/trygo$ time php ./picture-grabber.php 
done
real	0m0.079s
user	0m0.024s
sys	        0m0.044s

Python

abdilah@abdilah-komputer:/opt/workspace/trygo$ time python picture-grabber.py 
done

real	0m0.175s
user	0m0.088s
sys	        0m0.076s
abdilah@abdilah-komputer:/opt/workspace/trygo$ time python picture-grabber.py 
done

real	0m0.167s
user	0m0.116s
sys    	0m0.044s
abdilah@abdilah-komputer:/opt/workspace/trygo$ time python picture-grabber.py 
done

real	0m0.164s
user	0m0.108s
sys	        0m0.048s