java如下
<ol class="dp-j">
<li class="alt"><span><span class="keyword">public</span><span> </span><span class="keyword">class</span><span> aa{ </span></span></li>
<li><span><span class="keyword">public</span><span> </span><span class="keyword">static</span><span> </span><span class="keyword">void</span><span> main(String[] args){ </span></span></li>
<li class="alt"><span>System.out.println(System.currentTimeMillis()+<span class="string">"----"</span><span>); </span></span></li>
<li><span><span class="keyword">int</span><span> a=</span><span class="number">0</span><span>; </span></span></li>
<li class="alt"><span><span class="keyword">int</span><span> i; </span></span></li>
<li><span><span class="keyword">for</span><span>(i=</span><span class="number">0</span><span>;i<span class="number">10000000</span><span>;i++){ </span></span></span></li>
<li class="alt"><span>a++; </span></li>
<li><span>} </span></li>
<li class="alt"><span>System.out.println(System.currentTimeMillis()); </span></li>
<li><span>} </span></li>
<li class="alt"><span>} </span></li>
</ol>
php如下
<ol class="dp-c">
<li class="alt"><span><span> </span></span></li>
<li><span><span class="func">echo</span><span> microtime(); </span></span></li>
<li class="alt"><span><span class="vars">$n</span><span>=0; </span></span></li>
<li><span><span class="keyword">for</span><span>(</span><span class="vars">$i</span><span>=0;</span><span class="vars">$i</span><span><span class="vars">$i</span><span>++){ </span></span></span></li>
<li class="alt"><span><span class="vars">$n</span><span>++; </span></span></li>
<li><span>} </span></li>
<li class="alt"><span><span class="func">echo</span><span> </span><span class="string">'----'</span><span>.microtime(); </span></span></li>
<li><span>?> </span></li>
</ol>
同样都是循环一千万次
运行结果如下
java用时0.015秒
php用时0.726秒
java的速度是php的48倍，差别居然这么大！！
