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Re: php daemon [message #179596 is a reply to message #179595]

Sun, 11 November 2012 22:17

Christoph Becker
Messages: 91
Registered: June 2012

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Member

Jerry Stuckle wrote:
> Notice the documentation says the zval CAN be freed - not the zval WILL
> be freed. Two entirely different statements.

ACK. I had noted that; therefore I wrote that the manual isn't very
clear in this (IMO important) regard. "can" does neither imply nor
exclude, that it "will" be done.

I've made the following test:

$a = uniqid(); // force dynamic memory allocation
echo memory_get_usage(), "\n";
$a = 'foo'; // don't unset($a), as this will change the "symbol table"
echo memory_get_usage(), "\n";
gc_collect_cycles(); // force garbage collection
echo memory_get_usage(), "\n";

The result with my PHP 5.4.7 on Windows XP:

121344
121304
121304

So either the zval holding the result of uniqid() is already freed, when
$a is set to 'foo', or gc_collect_cycles() doesn't actually trigger the
garbage collector in this case.

--
Christoph M. Becker

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[Message index]

		php daemon By: SL on Sun, 11 November 2012 17:18
		Re: php daemon By: Jerry Stuckle on Sun, 11 November 2012 19:04
		Re: php daemon By: Christoph Becker on Sun, 11 November 2012 20:05
		Re: php daemon By: Jerry Stuckle on Sun, 11 November 2012 20:35
		Re: php daemon By: Christoph Becker on Sun, 11 November 2012 21:22
		Re: php daemon By: Jerry Stuckle on Sun, 11 November 2012 21:36
		Re: php daemon By: Christoph Becker on Sun, 11 November 2012 22:17
		Re: php daemon By: Jerry Stuckle on Sun, 11 November 2012 23:11
		Re: php daemon By: Christoph Becker on Mon, 12 November 2012 13:35
		Re: php daemon By: Jerry Stuckle on Mon, 12 November 2012 13:38
		Re: php daemon By: Jerry Stuckle on Tue, 13 November 2012 12:44
		Re: php daemon By: Christoph Becker on Wed, 14 November 2012 20:19
		Re: php daemon By: Jerry Stuckle on Wed, 14 November 2012 21:33
		Re: php daemon By: Christoph Becker on Wed, 14 November 2012 22:13
		Re: php daemon By: Jerry Stuckle on Thu, 15 November 2012 12:41
		Re: php daemon By: Christoph Becker on Thu, 15 November 2012 15:55
		Re: php daemon By: SL on Mon, 12 November 2012 15:45
		Re: php daemon By: The Natural Philosoph on Mon, 12 November 2012 16:08
		Re: php daemon By: Goran on Tue, 13 November 2012 07:57
		Re: php daemon By: Jerry Stuckle on Tue, 13 November 2012 12:47
		Re: php daemon By: Goran on Tue, 13 November 2012 13:54
		Re: php daemon By: The Natural Philosoph on Tue, 13 November 2012 14:13
		Re: php daemon By: Jerry Stuckle on Tue, 13 November 2012 17:23
		Re: php daemon By: Goran on Wed, 14 November 2012 07:43
		Re: php daemon By: Jerry Stuckle on Wed, 14 November 2012 10:51
		Re: php daemon By: Goran on Thu, 15 November 2012 13:08
		Re: php daemon By: Jerry Stuckle on Thu, 15 November 2012 13:46
		Re: php daemon By: Goran on Thu, 15 November 2012 15:09
		Re: php daemon By: Jerry Stuckle on Thu, 15 November 2012 16:25
		Re: php daemon By: Tim Streater on Thu, 15 November 2012 16:20

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