[Grok-dev] Iterativly emptying a grok.container shows weird behavior

[Dr. Volker Jaenisch]

HJi Tres!

Tres Seaver schrieb:
> Volker might like it more if the container had 100,000 items in it,
> where iterating over the keys rather than getting them all back as a
> list would be much faster.
>   
One of my professions is performance analysis and the optimisation of 
server-clusters.
At the moment I work on a performance comparison between Grok/ZODB and 
Grok/SQLAlchemy
for a project with far more than 100.000 Datasets.

I wrote this email purposeful from the perspective of the Enduser and 
not from my professional perspective.
I have hoped that my self ironic writing style has made that clear.

Yesterday I noticed that the tutorial (which I like otherwise very much) 
lead me to program nonsense.
Me as experianced programmer may find the error - the Enduser that GROK 
addresses may not.

> Mutating a container while iterating over it is always problematic.
I know. I would never wrote this code if I knew that I am ITERATING 
(using an iterator) over a
datastructure when using the .keys() methode.

If this methode was named .getIterator() I would have been warned.

Beste Regards

Volker

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