From: Tamara Temple <tamouse.lists@...>
Date: 2013-06-05T09:53:22+09:00
Subject: Re: Ruby extremely slow compared to PHP

Mick Jagger <lists@ruby-forum.com> wrote:
> Tamara Temple wrote in post #1111074:
> > So, basically, curl is getting a lot less data than Net::HTTP is
> > getting. I haven't delved into why this is so, but these are interesting
> > stats:
> >
> >
> > This is for the ruby version:
> >
> > Total fetch time:  28 seconds.
> > Total fetch size:  1954452 bytes.
> >
> > real  0m28.175s
> > user  0m0.224s
> > sys  0m0.020s
> >
> >
> >
> > And this is for the PHP version:
> >
> > Total fetch time:  18 seconds.
> > Total fetch bytes: 224888
> >
> > real  0m18.077s
> > user  0m0.048s
> > sys  0m0.028s
> >
> > Look at the difference in the amount of data transferred. Net::HTTP is
> > pulling in *eight times* as much data as curl is. Why is this the case?
> > That might be worth more investigation...
> >
> > But also look at the differences shown; the algorithms themselves take
> > nearly no time, which is to be expected.
> >
> > At any rate (haha, p.i.), you definitely can not make the case that ruby
> > is slower than php from this, as all the time is spent in transfer, not
> > execution.
> >
> > P.S. "Mick": I had to clean up your PHP script a bit as it was tossing
> > warnings and notices all over. Your ruby script, OTOH, was flawless. I
> > did change a couple things in order to get the totals, but not the
> > fundamental algorithms.
> 
> Thanks for your answer!
> 
> I think the PHP warnings are because I have disabled them, but think it 
> would be a good practice to turn them on again haha.
> 
> As you could have seen, in my PHP script, the cURL handle is not closed, 
> what improves a lot the request speed as I have tested. May be because 
> of this the Ruby script is slower.

The curl handle *is* closed -- it is a local variable (no globals
given). Plus, you are in fact reinitializing it every time at the top of
the two function calls.

//This functions returns body of $url
	function getBody($url){
		$ch = curl_init();

//This functions returns response size
	function getResponseSize($url){
		$ch = curl_init();

(These are from your pastbin entries.)

I'd be curious to see what you had when you thought you weren't actually
re-initializing, but that's way off topic for this group.

> So the "slowness" of the script is because of how connections are 
> handled I guess.

I'm still going with compression vs. non-compressed.