Re: Re: optimilize web page loading

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2008. 03. 28, péntek keltezéssel 09.00-kor Robert Cummings ezt írta:
> On Fri, 2008-03-28 at 09:31 +0100, Zoltán Németh wrote:
> > 2008. 03. 28, péntek keltezéssel 09.19-kor Zoltán Németh ezt írta:
> > > 2008. 03. 27, csütörtök keltezéssel 10.21-kor Shawn McKenzie ezt írta:
> > > > Jason Pruim wrote:
> > > > > 
> > > > > On Mar 27, 2008, at 11:05 AM, Shawn McKenzie wrote:
> > > > >> Al wrote:
> > > > >>> Good point.  I usually do use the single quotes, just happened to key
> > > > >>> doubles for the email.
> > > > >>>
> > > > >>> Actually, it's good idea for all variable assignments.
> > > > >>>
> > > > >>> Philip Thompson wrote:
> > > > >>>> On Mar 26, 2008, at 6:28 PM, Al wrote:
> > > > >>>>> Depends on the server and it's load.  I've strung together some
> > > > >>>>> rather large html strings and they aways take far less time than the
> > > > >>>>> transient time on the internet. I used to use OB extensively until
> > > > >>>>> one day I took the time to measure the difference. I don't recall the
> > > > >>>>> numbers; but, I do recall it was not worth the slight extra trouble
> > > > >>>>> to use OB.
> > > > >>>>>
> > > > >>>>> Now, I simple assemble by html strings with $report .= "foo"; And
> > > > >>>>> then echo $report at the end. It also makes the code very easy to
> > > > >>>>> read and follow.
> > > > >>>>
> > > > >>>> You might as well take it a step further. Change the above to:
> > > > >>>>
> > > > >>>> $report .= 'foo';
> > > > >>>>
> > > > >>>> This way for literal strings, the PHP parser doesn't have to evaluate
> > > > >>>> this string to determine if anything needs to be translated (e.g.,
> > > > >>>> $report .= "I like to $foo"). A minimal speedup, but nonetheless...
> > > > >>>>
> > > > >>>> ~Philip
> > > > >>>>
> > > > >>>>
> > > > >>>>> Andrew Ballard wrote:
> > > > >>>>>> On Wed, Mar 26, 2008 at 1:18 PM, Al <news@xxxxxxxxxxxxx> wrote:
> > > > >>>>>>> You are really asking an HTML question, if you think about it.
> > > > >>>>>>>
> > > > >>>>>>> At the PHP level, either use output buffering or assemble all your
> > > > >>>>>>> html string as a variable and
> > > > >>>>>>> then echo it.  The goal is to compress the string into the minimum
> > > > >>>>>>> number of packets.
> > > > >>>>>> Yes, but do so smartly. Excessive string concatenation can slow
> > > > >>>>>> things
> > > > >>>>>> down as well. On most pages you probably won't notice much
> > > > >>>>>> difference,
> > > > >>>>>> but I have seen instances where the difference was painfully obvious.
> > > > >>>>>> Andrew
> > > > >>
> > > > >> Yes and if your script takes .00000000000000000000000000000002 seconds
> > > > >> to run using double quotes it will only take
> > > > >> .000000000000000000000000000000019 seconds with single (depending upon
> > > > >> how many quotes you have of course)  :-)
> > > > > 
> > > > > I'm coming in late to this thread so sorry if I missed this :)
> > > > > 
> > > > > How much of a difference would it make if you have something like this:
> > > > > echo "$foo bar bar bar bar $foo $foo"; verses: echo $foo . "bar bar bar
> > > > > bar" . $foo $foo; ?In other words... You have a large application which
> > > > > is most likely to be faster? :)
> > > > > 
> > > > > 
> > > > I would assume your 2 examples to be the same because the point is that
> > > > the PHP interpreter must parse for vars to substitute when it encounters
> > > > double-quotes whether there are any vars in it or not.  With
> > > > single-quotes the interpreter does not have to worry about it.
> > > > Regardless, the speed diff is probably negligible, hence my flame
> > > > inviting post. :-)
> > > > 
> > 
> > ehh my answer is meant to be here:
> 
> It's still wrong >:)
> 
> > 
> > nope. it parses both, since you may have escaped characters within
> > > single quotes too. so the difference only comes in when you actually
> > > have a variable in the string.
> >
> > sorry its morning ;)
> 
> Aaah, that's why you're confused :P

yeah maybe. you're right, the bytecode is the same. but somewhere I
heard that the parsing is the same too - because escaped characters can
be in any string, though I'm not that sure about this anymore, as my
link proved something else ;)

greets
Zoltán Németh

> 
> ;)
> 
> Cheers,
> Rob.


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