Internal and External truncation conditions (original) (raw)

Remi Forax forax at univ-mlv.fr
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

Rémi

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