[wp-trac] [WordPress Trac] #11559: split HTTP Class and Functions

[WordPress Trac]

#11559: split HTTP Class and Functions
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 Reporter:  dd32          |       Owner:     
     Type:  enhancement   |      Status:  new
 Priority:  normal        |   Milestone:  3.0
Component:  Optimization  |     Version:  3.0
 Severity:  normal        |    Keywords:     
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Comment(by jacobsantos):

 Replying to [comment:8 dd32]:
 > Interesting, I didnt realise that. If you wanted to forcably include it
 for caching reasons, that'd be a easy enough work around though. Since
 plugins are included inside a if conditional, does that mean something
 similar? or are they smart enough to realise it in that case?

 Well, I think that is the problem in any case. If the opcode cache
 extension doesn't know which path is going to be taken, then well it can
 do two things really. It can load the file and cache it where the require
 or include is. However, since we are also talking about a loop, I'm not
 sure it would even bother, since it would have to break the loop and it
 can't do that.

 A simple conditional might be okay, but I believe the problem is that with
 conditionals, it is unknown when they will come into affect, so if they
 cache the opcodes in the file, they'll be keeping extra opcodes that may
 not be needed in the next request and slow down execution.

 Of course, I could be wrong and they may just store the opcodes per file
 instead of all together. I believe PHP executions is to store all of the
 opcodes together, so in this case it would be my fear, but some opcode
 caching extensions extend the PHP engine further and might be able to do
 it per file and per modified time (since given that opcode caching
 extensions also keep track of modified file time or just expires the files
 after a certain time).

 What I do know is that conditionals trip up opcode caching extensions. To
 what extent will have to be asked of someone who works on one of them. I
 do offer some conjecture until that time.

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Ticket URL: <http://core.trac.wordpress.org/ticket/11559#comment:9>
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