Re: Apache + mod_php performance

On 9/26/24 9:17 PM, Arne Vajhøj wrote:

On 9/26/2024 9:26 PM, Lawrence D'Oliveiro wrote:

On Thu, 26 Sep 2024 21:20:38 -0400, Arne Vajhøj wrote:

A very quick search make me think that the mailbox is only used for
control not for data.

>
Could still be a bottleneck, though.

 If it is only used for the parent to signal the child to terminate?
 

                                     That and the need for all the ASTs.

 Why should AST's be a problem?
 The "call this function when task is done" approach is
a very common design today. DEC was ahead of time with
that.
 And implementation wise then the AST's worked on VAX 700
series 45 years ago. Todays systems are extremely much
faster - maybe a factor 10000 faster.

There are some limitations around ASTs, especially when mixed with
threads.  The definitive wizard article is here:
https://forum.vmssoftware.com/viewtopic.php?t=5198
But I think your basic question is why Apache is slower than Tomcat,
right?  The only thing I can think of that hasn't already been mentioned
is that Tomcat code is JIT-compiled, which is likely to be pretty good,
optimized code, whereas Apache is probably either cross-compiled or
native-compiled with an early enough field test compiler that there are
no optimizations.