[ZODB-Dev] Checking the length of OOBTree

[Adam GROSZER]

Hello,

And have a look at
http://svn.zope.org/zope.container/trunk/src/zope/container/btree.py?rev=107468&view=markup
for usage.

self.__len = Length()

Thursday, April 8, 2010, 5:41:04 PM, you wrote:

LR> A BTree does not keep track of it's length. See BTrees.Length.Length:

LR> http://apidoc.zope.org/++apidoc++/Code/BTrees/Length/Length/index.html

LR> Laurence

LR> On 8 April 2010 16:36, Leszek Syroka
LR> <leszek.marek.syroka at cern.ch> wrote:
>> Hi,
>>
>> what is the fastest way of checking the number of elements in OOBtree.
>> Execution time of
>>
>> len( OOBtree.keys() ) and len(OOBtree)
>>
>> is exactly the same. For big data sets execution time is unacceptable. I
>> found out that in the implementation of OOBtree (written in C) there is
>> a variable called 'len', which seems to contain the length of the tree.
>> Is it possible to access that variable from the python code without
>> modifying the source?
>>
>> Best regards
>> Leszek
>> _______________________________________________
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>>
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LR> _______________________________________________
LR> For more information about ZODB, see the ZODB Wiki:
LR> http://www.zope.org/Wikis/ZODB/

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-- 
Best regards,
 Adam GROSZER                            mailto:agroszer at gmail.com
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