[TYPO3-team-templavoila] Caching of xml2array during rendering

[Niels Fröhling]

Steffen Kamper wrote:
> hi Daniel,
> 
> Daniel Pšötzinger schrieb:
>> Pls see patch.
>>
>> It caches the parsed xml in a seperate "_cache" field. Since it used 
>> the "tstamp" to check the cache it should be completly transparent and 
>> increases performance a lot (since xml2array tooks quite 50% of 
>> rendering time)
>>
> 
> do you have some profiling data? I believe it's more fast but would be 
> interesting to see the factor.
> 
> I will test it on my local machine too.

  Here are three cases:

all caches cleared (sections, pages, config, all!)
./pprofp -U -O 50 ./cache_clean_all.prof

only the page-cache cleared
./pprofp -U -O 50 ./cache_clean_pages.prof

running with full cache
./pprofp -U -O 50 ./cache_full.prof

  All three cases are with logged in FE-user and BE-user (with admin panel 
active, but all modules closed). The TV-version used has three levels of 
inheritance (so walks rootline, all flexs and merges XMLs). The profile runs 
with xcache as zend-extension.

  Based on the evaluation I like to dispute the positive effect of the patch, 
and would not agree to sacrifice database-space for microseconds of win. I also 
suggest that the additional workload of mysql + the runtime of unserialize may 
turn out slower than xml2array.

> vg Steffen

  BTW: You can use the data to identify quite some other bottlenecks in T3-Core. ;^)
  BTW2: TV->parseValues is not slow by itself, it's the TS-engine which sinks 
the ship. I can provide logs without child-time included.

  Ciao
	Niels

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