blocks|key|2371582|text|每个文件请求都涉及到到服务器的往返。您请求的单个文件越多，往返次数越多，页面加载速度越慢。将尽可能多的文件合并到一个文件中，可以减少请求的数量，从而改善页面加载时间。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2371583|这是一个很好的经验法则，但不要太执着。如果您需要为不同的目的加载不同的版本，请继续并这样做，前提是您不要将代码和CSS拆分成太多的小片段。|2371584|构成“太多”的是具体的网站和系统。尝试一些组合，找出适合你的方法。每个系统都是不同的。|2371585|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|$]]

Each request for a file involves a round-trip to the server. The more individual files you request, the more round-trips and the slower the page load. Combining as many files in to one as possible reduces the number of requests, and therefore improves page load times.

This is a good rule-of-thumb, but don't get too hung up on it. If you need to load different version for different purposes, go ahead and do so, provided you don't split your code and CSS into too many small fragments

What constitutes 'too many' is site and system specific. Try some combinations and find what works for you. Every system is different.

blocks|key|1051307|text|你不可能什么都有。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1051308|老实说，考虑到他们是被缓存的，这没什么大不了的。|1051309|为了回答你的问题，|1051310|Q1.+Could+any+body+elaborate+on+this+how+would+it+be+fast+to+merge+them+in+one?|offset|length|style|CODE|1051311|它将发出一个请求而不是多个请求，从而使第一个页面加载速度更快。|1051312|Q2.+In+cases+where+I+need+conditionally+different+version+of+css/javascript+(because+of+browser+type+or+version)+should+I+minify+and+use+that+particular+file+separately?+but+that+will+break+the+rule+of+putting+all+files+in+a+single+one.+If+any+body+has+done+it+in+a+way+could+you+please+share+it+here.|1051313|去做吧。你不得不。|1051314|entityMap^0|0|0|0|0|27|0|0|0|8D|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|W|8|@$H|X|I|Y|J|K]]|9|@]|A|$]]|$1|L|3|M|5|6|7|Z|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|10|8|@$H|11|I|12|J|K]]|9|@]|A|$]]|$1|P|3|Q|5|6|7|13|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|S|$]]

You can't have everything.

And to be honest, it's not a big deal considering they are cached.

To answer your question, 

<code>Q1. Could any body elaborate on this how would it be fast to merge them in one?</code>

It will make one request instead of several hence making the the first page load faster.

<code>Q2. In cases where I need conditionally different version of css/javascript (because of browser type or version) should I minify and use that particular file separately? but that will break the rule of putting all files in a single one. If any body has done it in a way could you please share it here.</code>

Do it. You have to.

blocks|key|2371620|text|对于这种情况，我在PHP框架中构建了一个压缩器来处理请求。Css或JS.我只需要包含每个文件，它结合和缓存取决于HTTP报头。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2371621|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|$]]

For that Case i Build a Compressor in my PHP framework which handle the request. Css or JS. I just have to include each file and it combine and cache depending on HTTP Header.

YSlow reports suggest that 

I have many javascript files on a particular page and these should be merged in one.
I have many css files on a particular page and these should be merged in one.

Q1. Could any body elaborate on this how would it be fast to merge them in one?

Q2. In cases where I need conditionally different version of <code>css/javascript</code> (because of browser type or version) should I minify and use that particular file separately? but that will break the rule of putting all files in a single one. If any body has done it in a way could you please share it here.

Should I combine my javascripts in one and css files in one for performance?

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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YSlow的报道表明我在一个特定的页面上有许多javascript文件，这些文件应该合并在一个页面中。我在一个特定的页面上有许多css文件，这些文件应该合并在一个页面中。Q1.有谁能详细说明这一点，如何快速地将它们合并在一起呢？Q2.在需要有条件不同版本的css/javascript (因为浏览器类型或版本)的情况下，...

问为了提高性能，我应该把我的javascripts和css文件组合在一起吗？
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问为了提高性能，我应该把我的javascripts和css文件组合在一起吗？EN