[TYPO3-core] FYI24 #11118: Cleanup: Reduce memory usage of db_list_extra

[Francois Suter]

This is an SVN patch request.

Type: Code cleanup

Bugtracker references:
http://bugs.typo3.org/view.php?id=11118

Branches:
TYPO3_4-2 and trunk

Problem:
The Web > List module consumes a lot of memory, leading sometimes to out 
of memory errors (especially if you're trying to do a CSV export at the 
same time).

Solution:
I found at least one place where 2 large concatenation operations took 
place (leading to out of memory error). One of the concatenated variable 
can be unset after the first concatenation error.

Notes:
Obviously this patch will not solve all problems, but consider it as a 
first (little) step to making things better :-)

If noone opposes it I'll commit that in 24h to 4.2 and trunk.

Cheers

-- 

Francois Suter
Cobweb Development Sarl - http://www.cobweb.ch
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