[TYPO3-core] RFC: #17275: Pagetree preloads huge amount of pages with initial load / refresh

[Steffen Kamper]

Hi,

This is SVN patch request.

Type: Bugfix

Branches: trunk

BT reference: http://bugs.typo3.org/view.php?id=17275

Preloading pages can be worthy, no request has to be done with expanding 
a node. but there are operations where the preloading is done always:
* reloading pagetree
* inserting a new page
* copy / move
* versioning
* initial loading

There is a hardcoded amount of 500 preloaded pages, so this can be a 
real performance problem on slower machines or many users.

Solution:
Make it configurable, add a lower default value (50)

vg Steffen
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