[Info-vax] Apache + mod_php performance

[Dan Cross]

In article <66fb3d25$0$717$14726298 at news.sunsite.dk>,
Arne Vajhøj  <arne at vajhoej.dk> wrote:
>On 9/30/2024 8:50 AM, Dan Cross wrote:
>> In article <vdbq08$1pg2p$2 at dont-email.me>,
>> Arne Vajhøj  <arne at vajhoej.dk> wrote:
>>> On 9/27/2024 8:38 PM, Dan Cross wrote:
>>>> In article <vd7hbi$tgu3$2 at dont-email.me>,
>>>> Arne Vajhøj  <arne at vajhoej.dk> wrote:
>>>>> And note that keep alive was not needed for me, but it is needed in many
>>>>> other scenarios:
>>>>> - web pages with lots of graphics
>>>>> - high volume server to server web services
>>>>
>>>> Actually, it's useful for any scenario in which you may send
>>>> several requests to the same server at roughly the same time,
>>>> such as an HTML document and separate CSS stylesheet, not just
>>>> graphics or "server to server web services".
>>>
>>> There is no difference in how graphics and CSS are handled,
>>> so the benefits of reusing a connection is the same.
>>>
>>> But there is a difference in number of requests. CSS will typical
>>> be cached by the browser. So number of CSS requests will be a fraction
>>> of number of HTML requests, while pages with lots of graphics
>>> will have many graphics requests per HTML request.
>> 
>> Why do you assume CSS will be cached and graphics will not?
>
>Different usage patterns.
>
>CSS and JS libraries are usually identical among all
>pages at site or a section of a site (to give an identical
>look and feel and to make development easier).
>
>The graphics (photo, drawings or whatever) on a graphics heavy
>page is usually unique for the page.

You have an awful lot of assumptions doing a lot of heavy
lifting for you there, all to justify avoiding using a default
feature of the protocol.  Sorry, I don't find that convincing.

>Users usually view several pages at a site or a section of
>a site in a session.
>
>So when the browser reach a page, then it is very likely that
>the CSS and JS are in the cache because they were fetched for
>a previous viewed page while it is unlikely that the graphics
>is in the cache.

I don't think this reflects how modern web apps are actually
authored.

	- Dan C.