測試用例分為用函數和類來進行一個大字符串的字符逐一讀取。

測試代碼

Node.js

函數

var fs = require("fs");

var content = fs.readFileSync("page.html", {

encoding: "utf-8"

});

function chars(content){

var length = content.length;

var pos = 0;

while(pos ++ < length){

var chr = content[pos - 1];

}

}

var start = Date.now();

chars(content);

var end = Date.now();

console.log(end - start);

類

var fs = require("fs");

var content = fs.readFileSync("page.html", {

encoding: "utf-8"

});

var Chars = function(str){

this.str = str;

this.length = str.length

this.pos = 0;

}

Chars.prototype.run = function(){

while(this.pos ++ < this.length){

var chr = this.str[this.pos - 1];

}

}

var start = Date.now();

var instance = new Chars(content);

instance.run();

var end = Date.now();

console.log(end - start);

PHP

函數

<?php

function chars($content){

$length = strlen($content);

$pos = 0;

while ($pos ++ < $length) {

$char = $content{$pos - 1};

}

}

$content = file_get_contents("page.html");

$start = microtime(true);

chars($content);

$end = microtime(true);

echo ($end - $start) . "\n";

?>

類

<?php

class Chars{

public function __construct($str){

$this->str = $str;

$this->length = strlen($str);

$this->pos = 0;

}

public function run(){

while($this->pos++ < $this->length){

$char = $this->str{$this->pos - 1};

}

}

}

$content = file_get_contents("page.html");

$start = microtime(true);

$instance = new Chars($content);

$instance->run();

$end = microtime(true);

echo ($end - $start) . "\n";

?>

Python

函數

import codecs

import time

def chars(content):

length = len(content)

pos = 0

while(pos < length):

char = content[pos]

pos = pos + 1

f = codecs.open('page.html', encoding='utf-8')

content = f.read()

start = time.time()

chars(content)

end = time.time();

print end - start

類

import codecs

import time

class Chars():

def __init__(self, str):

self.str = str

self.length = len(str)

self.pos = 0

def run(self):

while(self.pos < self.length):

char = self.str[self.pos]

self.pos = self.pos + 1

f = codecs.open('page.html', encoding='utf-8')

content = f.read()

start = time.time()

instance = Chars(content)

instance.run()

end = time.time();

print (end - start)

其中 page.html 文件內容為一個長度為 的文本。

測試結果

語言 函數 類

Node.js 0.022s 0.026s

PHP 0.35s 1.02s

Python 0.58s 1.50s

總結

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