blocks|key|5677265|text|速度并不重要|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5677266|在大多数情况下。|5677267|处理成本很低。使用您熟悉的代码编写代码。在选择语言之前，编写适当的代码在速度方面会走得更远。可靠的编码约定和设计计划也会有更多帮助。|5677268|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

<h1>Speed doesn't matter</h1>

in most cases.

Processing is cheap. Code in what you're comfortable with. Writing proper code goes much further for speed then choosing a language. Solid coding conventions and design plan will also help more.

blocks|key|4259541|text|我能找到的最好的答案|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4259542|“需要考虑的事情：|4259543|4259544|Java+web应用程序被编译成字节码。甚至是在运行时编译的JSP。|ordered-list-item|4259545|数据可以缓存在活动的servlet实例中-据我所知，在PHP中没有直接/简单的方法来实现这一点(内存中只有一个servlet/|4259546|实例)|4259547|-+If+anybody+knows+how+to+cache+data+in+PHP+without+resorting+to+ugly+hacks,+please+enlighten+me!|code-block|syntax|javascript|4259548|​|4259549|4259550|Java应用程序往往是n层的，这通常会导致应用程序的可维护性更高，但会有轻微的性能损失。这可能听起来像巨魔，但老实说:即使在Java本身中，直接使用JDBC也总是比通过三层对象访问数据库更快。|4259551|4259552|但是，n层Java应用程序能够比未编译的、破解的整体式PHP脚本更快地访问数据库吗？我不认为这个问题有答案。|4259553|综上所述，我正在为php5开发一个n层MVC框架(它被称为纯(http://www.sf.net/projects/php-pure))，所以我的php应用程序通常也是n层的。当它成为一个问题时，我会担心速度。就目前而言，这绝对不是一个问题。|offset|length|4259554|courtesy+of+krumms|4259555|entityMap|0|LINK|mutability|MUTABLE|url|http://www.sf.net/projects/php-pure|1|http://www.webhostingtalk.com/archive/index.php/t-373862.html^0|0|0|0|0|0|0|0|0|0|0|0|0|V|Z|0|0|0|I|1|0^^$0|@$1|2|3|4|5|6|7|1E|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1F|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|1H|8|@]|9|@]|A|$]]|$1|H|3|I|5|G|7|1I|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1J|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|1K|8|@]|9|@]|A|$O|P]]|$1|Q|3|R|5|6|7|1L|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]|$1|T|3|U|5|G|7|1N|8|@]|9|@]|A|$]]|$1|V|3|-4|5|6|7|1O|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|1P|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|1Q|8|@]|9|@$10|1R|11|1S|1|1T]]|A|$]]|$1|12|3|13|5|6|7|1U|8|@]|9|@$10|1V|11|1W|1|1X]]|A|$]]|$1|14|3|-4|5|6|7|1Y|8|@]|9|@]|A|$]]]|15|$16|$5|17|18|19|A|$1A|1B]]|1C|$5|17|18|19|A|$1A|1D]]]]

Best answer I could find

"stuff to consider:

<ol>
<li>Java web applications are compiled
to bytecode. Even JSPs, which are
compiled at runtime. This is an
advantage over most uses of PHP,
where the Zend Optimizer is not in
use.</li>
<li>Data can be cached in a live servlet
instance - no direct/easy way of
doing this in PHP to my knowledge
(there is only ever a single
instance of a servlet/JSP in memory)

<ul>
<li>If anybody knows how to cache data in PHP without resorting to ugly
hacks, please enlighten me!</li>
</ul></li>
<li>Java applications tend to be
n-tiered, which generally results in
a more maintainable application at a
slight performance penalty. This
probably sounds trollish, but
honestly: even within Java itself
direct use of JDBC will always be
faster than going through three
layers of objects to the database.</li>
</ol>

But is an n-tiered Java application able to hit the database sooner than an uncompiled, hacked-up monolithic PHP script? I don't think there's an answer to that question.

All that said, I'm working on an n-tiered MVC framework for php 5 (it's called Pure (<a href="http://www.sf.net/projects/php-pure" rel="noreferrer">http://www.sf.net/projects/php-pure</a>)), so my PHP applications are generally n-tiered too. I'll worry about speed when and if it becomes an issue. For now, it's definitely not an issue."

<a href="http://www.webhostingtalk.com/archive/index.php/t-373862.html" rel="noreferrer">courtesy of krumms</a>

blocks|key|5677355|text|除非你定义了你想要测量的速度，否则你不能用其中之一来回答这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5677356|有些事情在PHP中要快得多(例如，在本机函数中)，有些事情在Java中要快得多。|5677357|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Can't answer this question with one or the other unless you define what you want to measure the speed of.

Some things are much faster in PHP (in a native function for example), other things are much faster in Java.

blocks|key|2148209|text|每种语言的意图都有很大的不同，因此，如果您正在争论使用哪种语言来完成特定的任务，通常应该基于该任务(以及每种语言对该任务的适应程度)而不是性能来做出决定。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2148210|对于用这种语言编写的代码的原始性能(而不是简单地调用标准库中的代码)，Java通常会比PHP运行得更快。如果这很重要，很可能PHP并不是很适合手头的任务。|2148211|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

The intent of each language is substantially different from the other, so if you're debating over which to use for a particular task, you should generally based the decision on that task (and how well suited each language is to it) rather than performance.

For raw performance of code written in the language (as opposed to simply calling code in the standard library), Java will probably run faster than PHP as an extremely general rule. If that matters, chances are that PHP just isn't very well suited to the task at hand.

blocks|key|1692029|text|抛开速度不谈，我相信Java的性能比PHP更好。但是用PHP开发项目会更快。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1692030|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Speed aside, I believe the performance of Java is better than PHP. But developing a project in PHP is faster.

blocks|key|2148305|text|这是一个很难回答的问题，因为理论上Java应该更快:它是预编译的，任何简单的算法在Java中的运行速度都会比PHP快，并且已经做了大量的工作来优化Java，从改进代码、标准库到JIT编译器等。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2148306|如果你不使用Zend优化器，PHP每次都会被加载和解释，对象在每次执行时都会被初始化，即使是最简单的字符串变量实际上也是一个复杂的对象，有很多方法需要支持。|2148307|问题是，在实践中，PHP站点似乎使用更少的资源运行得更快。|2148308|我认为这是因为PHP开发人员采用了一种更直接的设计方法，不会迷失在尝试实现奇异的设计模式和实现无穷无尽的无意义的抽象上。|2148309|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

It is a difficult one to answer as in theory Java should be faster:
it's precompiled, any trivial algorithim will run faster in Java than PHP and there has been a vast amount of work done to optimise Java from improving the code, standard libraries, to JIT compilers, etc.

PHP is loaded and interpreted every time if you're not using the Zend optimiser, objects are intialised on every execution, even the most trivial string varaible is actually a complex object with many methods to support.

The problem is that in practice PHP sites seem to run faster using fewer resources.

I think this is because PHP developers take a more straightforward approach to design and don't get lost trying to implement exotic design patterns and implementing endless pointless abstractions.

Which language is faster for web, Java or PHP?

Java vs. PHP Speed Comparison

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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