Controlled experiment (1) - Batch cleaning of system temporary files, controlled experiment cleaning_PHP tutorial

Controlled experiment (1) - Batch cleaning of system temporary files, controlled experiment cleaning

The language debate has been around for a long time, let’s do some IO experiments below (traversing more than 9G files, batch deletion), try to use facts to compare who is better and who is worse. Operating system: win7 64-bit, File package size: 9.68G.

1. Language: C#

Development environment: vs 2013

Total number of lines of code: 43 lines

Time taken: 7 seconds

Code:

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BatchDelete
{
    class Program
    {
        static void Main(string[] args)
        {
            // 输入目录 e:\tmp
            string path;
            Console.WriteLine("输入要清理的目录：");
            path = Console.ReadLine();
            // 开始计时
            Console.WriteLine("开始计时："+DateTime.Now.ToString("HH:mm:ss"));
            // 先遍历匹配查找再循环删除
            if (Directory.Exists(path))
            {
                Console.Write("正在删除");
                foreach (string fileName in Directory.GetFileSystemEntries(path))
                {
                    if (File.Exists(fileName) && fileName.Contains("cachegrind.out"))
                    {
                        File.Delete(fileName);
                    }
                }
                Console.WriteLine("");
            }
            else
            {
                Console.WriteLine("该目录不存在!");
            }
            // 计时结束
            Console.WriteLine("结束计时：" + DateTime.Now.ToString("HH:mm:ss"));
            Console.ReadKey();
        }
    }
}

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2. Language: C/C

Development environment: vs 2013

Total number of lines of code: 50 lines

Time taken: 36 seconds

Code:

#include <iostream><span>
#include </span><<span>string</span>><span>
#include </span><Windows.h><span>
#include </span><boost\filesystem\operations.hpp><span>
#include </span><boost\filesystem\path.hpp><span>
#include </span><boost\filesystem\convenience.hpp><span>
#include </span><boost\algorithm\<span>string</span>.hpp>
<span>using</span> <span>namespace</span><span> std;

</span><span>int</span> main(<span>int</span> argc, <span>char</span> *<span> argv[])
{
    </span><span>//</span><span> 输入目录 e:\tmp</span>
    <span>string</span><span> strPath;
    cout </span><< <span>"</span><span>输入要清理的目录：</span><span>"</span> <<<span> endl;
    getline(cin, strPath);
    </span><span>//</span><span> 开始计时    </span>
    SYSTEMTIME sys_time;        <span>//</span><span>声明变量</span>
    GetLocalTime(&sys_time);    <span>//</span><span>将变量值设置为本地时间</span>
    printf(<span>"</span><span>开始计时：%02d:%02d:%02d\n</span><span>"</span><span>, sys_time.wHour,sys_time.wMinute,sys_time.wSecond);
    </span><span>//</span><span> 先遍历匹配查找再循环删除</span>
    <span>namespace</span> fs =<span> boost::filesystem;
    fs::path full_path(fs::initial_path());
    full_path </span>=<span> fs::system_complete(fs::path(strPath, fs::native));
    </span><span>if</span><span> (fs::exists(full_path))
    {
        cout </span><< <span>"</span><span>正在删除</span><span>"</span><span> ;
        fs::directory_iterator item_begin(full_path);
        fs::directory_iterator item_end;
        </span><span>for</span> (; item_begin != item_end; item_begin++<span>)
        {
            </span><span>if</span> (!fs::is_directory(*<span>item_begin))
            {
                </span><span>if</span> (fs::exists(item_begin->path()) && boost::contains(item_begin->path().<span>string</span>(), <span>"</span><span>cachegrind.out</span><span>"</span><span>))
                {
                    fs::remove(item_begin</span>-><span>path());
                }
            }
        }
        cout </span><< <span>""</span> <<<span> endl;
    }
    </span><span>else</span><span>
    {
        cout </span><< <span>"</span><span>该目录不存在!</span><span>"</span> <<<span> endl;
    }
    </span><span>//</span><span> 计时结束</span>
    GetLocalTime(&<span>sys_time);
    printf(</span><span>"</span><span>计时结束：%02d:%02d:%02d\n</span><span>"</span><span>, sys_time.wHour, sys_time.wMinute, sys_time.wSecond);
    system(</span><span>"</span><span>pause</span><span>"</span><span>);
    </span><span>return</span> <span>0</span><span>;
}</span>

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3. Language: PHP

Development environment: Phpstorm

Total number of lines of code: 32 lines

Time taken: 13 seconds

Code:

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 16-1-29
 * Time: 上午9:31
 */
date_default_timezone_set('prc');
//输入目录 e:\tmp
$path = 'e:\tmp';
//开始计时
echo date("H:i:s",time()) . '<br/>';
//先遍历匹配查找再循环删除
if(is_dir($path))
{
    echo "正在删除";
    $mydir = dir($path);
    while($file = $mydir->read())
    {
        if(file_exists("$path/$file") && strpos($file, 'cachegrind.out') === 0)
        {
            unlink("$path/$file");
        }
    }
    echo '<br/>';
}
else
{
    echo "该目录不存在!" . '<br/>';
}
//计时结束
echo date("H:i:s",time()) . '<br/>';

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4. Language: Java

Development environment: eclipse

Total lines of code: 43 lines

Time consuming: 10 seconds

Code:

package com.yejing;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;

public class Test {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		// 输入目录 e:\tmp
		String path = null;
		System.out.println("输入要清理的目录：");
		path = s.next();
		// 开始计时
		Date nowTime=new Date(); 
		SimpleDateFormat time=new SimpleDateFormat("HH:mm:ss"); 
		System.out.println("开始计时："+ time.format(nowTime)); 
		// 先遍历匹配查找再循环删除
		File dir = new File(path);
		if(dir.exists()){
			System.out.print("正在删除");
			File[] fs = dir.listFiles();
			for(int i=0;i<fs.length;i++){
				if(!fs[i].isDirectory()){
					if(fs[i].isFile() && fs[i].exists() && fs[i].getName().contains("cachegrind.out"))
					{
						fs[i].delete();  
					}
				}
			}
			System.out.println("");
		}else{
			System.out.println("该目录不存在!");
		}
		// 计时结束
		nowTime=new Date(); 
		System.out.println("开始计时："+ time.format(nowTime)); 
	}

}

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5. Language: Python 3.3.5

Development environment: IDLE

Total number of lines of code: 20 lines

Time consuming: 10 seconds

Code:

# -*- coding: utf-8 -*-  
import datetime
import os
 
# 输入目录 e:\tmp
path = input("输入要清理的目录：\n");
# 开始计时
print("开始计时：",datetime.datetime.now().strftime('%H:%M:%S'));
# 先遍历匹配查找再循环删除
if(os.path.exists(path)):
    print("正在删除");
    for parent,dirnames,filenames in os.walk(path):
        for filename in filenames:
            targetFile = os.path.join(parent,filename)
            if (os.path.isfile(targetFile) and "cachegrind.out" in targetFile):
                os.remove(targetFile)
else:
    print("该目录不存在!");
# 计时结束
print("结束计时：",datetime.datetime.now().strftime('%H:%M:%S'));

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