[Info-vax] Apache + mod_php performance

[Arne Vajhøj]

On 10/2/2024 10:47 AM, Dan Cross wrote:
> In article <vdjjpv$37f8q$2 at dont-email.me>,
> Arne Vajhøj  <arne at vajhoej.dk> wrote:
>> On 10/2/2024 9:31 AM, Dave Froble wrote:
>>> On 10/1/2024 4:17 PM, Arne Vajhøj wrote:
>>>> On 10/1/2024 3:45 PM, Dan Cross wrote:
>>>>> In article <vd9mqn$1cm1v$1 at dont-email.me>,
>>>>> Dave Froble  <davef at tsoft-inc.com> wrote:
>>>>>> On 9/27/2024 9:11 PM, Arne Vajhøj wrote:
>>>>>> [snip]
>>>>>>> I believe that server config supporting keep alive
>>>>>>> causing performance to drop to 1/10'th for clients
>>>>>>> not using keep alive is a bug.
>>>>>>
>>>>>> Feature ...
>>>>>
>>>>> Yes, it is a feature, despite this report of a non-problem.
>>>>>
>>>>> In this case, later posts revealed the real culprit: Arne's test
>>>>> program did not follow the protocol, and was not sending
>>>>> `Connection: close` with an HTTP/1.1 request; in response, the
>>>>> server (correctly) kept the connection open waiting for the
>>>>> client to send another request.
>>>>
>>>> It does not really make any sense for the test client
>>>> to send "Connection: close".
>>>
>>> It does if the server is holding the connection open, waiting for more.
>>
>> Not really.
>>
>> The real goal is to make it work well for users not to make the
>> test program work well.
>>
>> Having the test program send "Connection: close" will improve
>> performance for the test program.
>>
>> But it does not improve anything for the web browsers that
>> does not send "Connection: close".
> 
> If a web browser sends an HTTP/1.1 request without the
> `Connection: close` header, it's likely that it wants that
> connection to be persistent, presumably so that it can use it
> for another request.

That is the purpose.

> You do not seem to understand how this is qualitatively
> different from your test program not sending `Connection: close`
> with its single request per connection, and then blocking until
> the server times it out.

It is qualitative different from what you are imaging.

The client does not block until the server times out.

Arne