[Haskell-cafe] uvector package appendU: memory leak?

[Manlio Perillo]

Don Stewart ha scritto:
> manlio_perillo:
>> Don Stewart ha scritto:
>>> [...]
>>>> So the question is: why appending an array of only one element to an  
>>>> existing array causes memory problems?
>>>
>>> It must copy the entire array.
>>>
>> Isn't it the same with snocU?
>>
>> And, since the final result is the same, what happens to the temporary  
>> memory used for array copying?
>>
>> I have executed the program with:
>>    +RTS -A128M -s -c -F1.1 -RTS
>>
>> The memory seems to leak.
> 
> Send me a test case.
> 

http://hpaste.org/fastcgi/hpaste.fcgi/view?id=3071

But Claus was right, appendU is lazy; this seems to be the cause of the 
problem.

However now I don't really understand why the two implementations 
differs in lazyness.

Or, to ask a different question, how can I make the version using 
insertWith strict?



Thanks  Manlio