Internal and External truncation conditions

Remi Forax forax at
Sun Feb 10 05:47:39 PST 2013

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


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