因为后续考虑实现 Fl 引擎的Node.js版本，所以对比了下Node.js和PHP的字符处理性能。发现Node.js真是甩了PHP几条街啊，再测试了下Python，比PHP还慢。
测试用例分为用函数和类来进行一个大字符串的字符逐一读取。
测试代码
Node.js
函数
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);
类
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
函数
<?php function chars($content){ $length = strlen($content); $pos = 0; while ($pos ++
类
str = $str; $this->length = strlen($str); $this->pos = 0; } public function run(){ while($this->pos++ 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
函数
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
类
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 文件内容为一个长度为 的文本。
测试结果
语言 函数 类 Node.js 0.022s 0.026s PHP 0.35s 1.02s Python 0.58s 1.50s
以上就是Node.js与PHP、Python的字符处理性能对比的详细内容，更多请关注本站其它相关文章！
