Eliot

if /when you have something, I would be more than happy to harvest the  
fixes.

stef

On Nov 1, 2008, at 8:12 PM, Eliot Miranda wrote:

> Hi All,
>
>     SparseLargeTable appears not to be sparse at all.  If you look  
> at  
> SparseLargeTable>>initChunkSize:size:arrayClass:base:defaultValue:  
> you'll see tat each bin is initialized with an instance of the base  
> class rather than being filled lazily.  Further, instead of  
> pvtNoCheckAt:put: lazily creating an entry in each bin as needed it  
> simply throws away the write if the bin is empty.  Instead the usage  
> pattern is to create fully-populated instances and then make them  
> sparse by sending zapDefaultOnlyEntries.
>
> It seems to me that  
> SparseLargeTable>>initChunkSize:size:arrayClass:base:defaultValue:  
> should leave bins empty until pvtNoCheckAt:put: puts other than the  
> default value.  Since I want to create a sparse table with 2^32  
> entries the existing approach won't work.
>
> I wondered whether anyone else had already fixed this or whether  
> there's a good reason not to lazily initialize.
>
> Best
> Eliot
>