Internal and External truncation conditions

[Remi Forax]

On 02/10/2013 02:42 PM, Doug Lea wrote:
> On 02/10/13 08:12, Doug Lea wrote:
>
>> Requiring that all Stream bulk computations like reduce
>> continuously check for async cancel status between each
>> per-element operation is unlikely to satisfy anyone at all,
>> yet seems to be the only defensible option if we were to
>> support it.
>>
>
> Actually, we already support it.
> Any per-element lambda supplied to any Stream method can
> itself do any kind of async cancel check itself, and throw
> an exception rather than returning a result.
>
> Case closed?

No, throwing an exception when the VM thinks that can it can escape is 
really slow.

>
> -Doug
>
>
>

Rémi