They do work.  They do exactly as advertised in the documentation.  As far
as their usefulness goes, I think it is fair to say that they are not as
useful as they could be, or put another way, the set of operations that are
future-safe is too small to make them practical for many folks.

On Mon, Sep 11, 2017 at 5:53 PM <mrmyers.random.suf...@gmail.com> wrote:

> Oh. That does seem troubling then.
>
> On Monday, September 11, 2017 at 6:45:45 PM UTC-4, Jon Zeppieri wrote:
>
>>
>>
>> > On Sep 11, 2017, at 6:39 PM, mrmyers.ra...@gmail.com wrote:
>> >
>> > As far as I'm aware, futures usually shouldn't improve performance
>> outside of networking or hardware-latency type situations. The main goal of
>> futures is just time-sharing, not improving performance. It doesn't
>> genuinely do things in parallel, it just interleaves the execution of
>> several things at once.
>>
>> This isn't true. Futures are for parallelism; they just happen to be
>> defeated by many, many operations. More to the point, they're not for
>> interleaving work. Racket's threads are for that.
>
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