[racket] Thread creation slow?

When I played around with it, I remember that the issue was that
threads created a lot of garbage, and made collecting garbage slow.  I
could create about 400 times as many boxes in a chain and get the same
gc time.

This lead to a quadratic(ish) runtime for creating a bunch of threads,
as each later GC took more time.


On Fri, Aug 10, 2012 at 8:51 AM, Asumu Takikawa <asumu at ccs.neu.edu> wrote:
> Hi all,
>
> On IRC the other day, this blog article about Racket came up:
>   http://cxwangyi.wordpress.com/2012/07/29/chinese-whispers-in-racket-and-go/
>
> In it, the author shows a program that creates many threads & channels
> and then daisy-chains some communication through them. The Racket
> version is significantly slower than the Go version (1 min. vs. 1 sec.).
>
> Is there a performance bug with thread creation here? Alternatively, is
> there a different way of coding the example that would make it faster?
>
> Cheers,
> Asumu
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