[TYPO3-core] RFC: Feature #6601 Speed up link rendering by implementing some local caches

[Martin Kutschker]

Martin Kutschker schrieb:
> This is a patch request fro trunk.
> 
> Problem: tslib_content::typolink uses some functions of t3lib_pageSelect 
> (via tslib_fe) that are likly to be called with the same arguments 
> during the rendering of a single page. These functions make SQL queries 
> which is a waste of the DB servers resources.
> 
> Solution: cache the result of those functions locally.
> 
> Bug reference: http://bugs.typo3.org/view.php?id=6601

I have noticed a problem with one of these caches. It seems that getPage() 
can be called twice and in-between TYPO3 may change the language. Probably 
only the case for the current page, when refetched for eg a menu or a link.

Nonetheless I have changed the key for the cache to accomodate for 
sys_language and also other object properties that might change in-flight.

I have commited patch as beta3 is nearing. Everything is fine now, but 
maybe we must revert to a none cached version for the final if there are 
more hidden dependencies for the cache key.

Masi
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