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

Manlio Perillo manlio_perillo at libero.it
Sun Mar 29 18:12:16 EDT 2009

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.


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

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

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