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Date: Mon, 11 Dec 2006 10:11:56 +0100
Message-ID: <00A2E2156BEE8446A81C8881AE117F1949C80E@companyweb>
Thread-Topic: [PHP-DEV] Re: [RFC] Magic Method that handles unset($object)
Thread-Index: Acccs29SLeEW+tuYQpqdiDjbrMtoggATeTkg
To: "Ants Aasma" <ants.aasma@gmail.com>,
	<internals@lists.php.net>
Subject: AW: [PHP-DEV] Re: [RFC] Magic Method that handles unset($object)
From: mp@webfactory.de ("Matthias Pigulla")

=20

> -----Urspr=FCngliche Nachricht-----
> Von: Ants Aasma [mailto:ants.aasma@gmail.com]=20

> That would indeed be too slow. The standard way to handle=20
> this, is to only check visibility periodically. That is how=20
> Java, .NET, Python and countless others do that. Check=20
> http://www.hpl.hp.com/personal/Hans_Boehm/gc/ for a sample of=20
> how an implementation might look like.

The whole issue comes up regularly on various lists, e. g. Propel or =
Phing suffer from it. Also see http://bugs.php.net/bug.php?id=3D33595. =
Working around this in userland may be possible but is at least painful =
and messy.

If the only problem is that detection is slow, wouldn't it be possible =
to add a gc_cleanup() function that performs the scan? Those who use PHP =
in a request/response environment need not care (everything is freed at =
the end of the request). Those who don't and hit the problem regularly =
will find a good place to make this call and certainly won't complain =
about the delay.=20

mp.