Hello. The current low-level memory management code in zend_mm.c places the free blocks as first on the bucket. This increases the fragmentation of newly allocated free blocks. I think it is a good idea to place the freed or newly allocated blocks as last on the bucket. Thus when a new block is allocated the allocation scheme will give preference to old and already fragmented memory segments. The new segments will be used only when a request for a big block is made. This will significantly decrease the memory fragmentation.
The current scheme uses the newly allocated segments as soon as possible because they are placed first on the list. This combined with the bad (IMHO) scheme of the high-level memory caching creates enormous memory fragmentation. A script that needs about 2MB of memory when run several times in a row may cause PHP to allocate about 10 MB of memory. vesselin -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php
