[racket] Racket v5.3.1

From: Jon Zeppieri (zeppieri at gmail.com)
Date: Thu Nov 8 19:06:02 EST 2012

On Thu, Nov 8, 2012 at 2:39 AM, Laurent <laurent.orseau at gmail.com> wrote:

>
>
>
>> * The `case' form dispatches on characters, fixnums, symbols, and
>>   keywords in logarithmic time.  (Thanks to Jon Zeppieri.)
>>
>
> No hidden constant for small dispatchers compared to the previous version?
>
>

Small case expressions (< 12 constants) are linear, not logarithmic, and
don't have any of the triple-dispatch overhead.
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