Re: Re: optimilize web page loading

On Thu, Mar 27, 2008 at 12:41 PM, Peter Ford <pete@justcroft.com> wrote: > > 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 $foo"). A minimal speedup, but nonetheless... > >>>> > >>>> ~Philip > >>>> > >>>> > >>>>> Andrew Ballard wrote: > >>>>>> On Wed, Mar 26, 2008 at 1:18 PM, Al <news@ridersite.org> wrote: > >>>>>>> You are really asking an HTML question, if you think about it. > >>>>>>> > >>>>>>> At the PHP level, either use output buffering or assemble all > >>>>>>> your > >>>>>>> html string as a variable and > >>>>>>> then echo it. The goal is to compress the string into the > >>>>>>> minimum > >>>>>>> number of packets. > >>>>>> Yes, but do so smartly. Excessive string concatenation can slow > >>>>>> things > >>>>>> down as well. On most pages you probably won't notice much > >>>>>> difference, > >>>>>> but I have seen instances where the difference was painfully obvious. > >>>>>> Andrew > >> > >> Yes and if your script takes .00000000000000000000000000000002 seconds > >> to run using double quotes it will only take > >> .000000000000000000000000000000019 seconds with single (depending upon > >> how many quotes you have of course) :-) > > > > I'm coming in late to this thread so sorry if I missed this :) > > > > How much of a difference would it make if you have something like this: > > echo "$foo bar bar bar bar $foo $foo"; verses: echo $foo . "bar bar bar > > bar" . $foo $foo; ?In other words... You have a large application which > > is most likely to be faster? :) > > > > > > There was a discussion about this a few weeks ago - ISTR that the compiler does > wierd things with double-quoted strings, something like tokenising the words and > checking each bit for lurking variables. > So in fact > > > echo "$foo bar bar bar bar $foo $foo"; > > is slowest (because there *are* variables to interpolate, > > > echo $foo . " bar bar bar bar ".$foo." ".$foo; > > is a bit faster, but the double-quoted bits cause some slow-down, > > > echo $foo . ' bar bar bar bar '.$foo.' '.$foo; > > is a bit faster again - the single quoted bits pass through without further > inspection, and finally > > > echo $foo,' bar bar bar bar ',$foo,' ',$foo; > > is actually the fastest, because the strings are not concatenated before output. > > I think that was the overall summary - I can't locate the original post to > verify (or attribute) but it's in this list somewhere... > > Cheers > > -- > Peter Ford phone: 01580 893333 > Developer fax: 01580 893399 > Justcroft International Ltd., Staplehurst, Kent > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > Can you prove these statements with real benchmarks that are current? Ilia said that it is a myth that there is a performance difference between " and ' in one of his talks.