[racket-dev] Release Announcement for v5.2.1

On 01/23/2012 06:30 PM, Robby Findler wrote:
> On Mon, Jan 23, 2012 at 6:27 PM, Ryan Culpepper<ryan at cs.utah.edu>  wrote:
>> - drracket
>>   - No stacktrace for syntax errors in DrRacket
>>   - change current-directory default init value
>>   - render convertibles as png (or changed since?)
>>   - autocompletion tweak
>>   - check syntax UI improvements?
>>
>> - redex
>>   - define-judgment, define-relation improvements
>>   - optimizations, caching
>>   - cycle check for define-language
>>
>> - icons and images package
>>   - new icons
>>   - libraries
>>
>> - teaching languages
>>   - planet require syntax
>>
>> - 2htdp/image
>>   - added bitmap/file
>>
>
> * The performance of Redex's matcher has been substantially improved;
> depending on the model you should see improvements between 2x and 50x
> in the time it takes to reduce terms.
>
> * DrRacket now has a new slate of icons
>
> The other seem too minor (and the second one is questionable; I think
> everyone will appreciate them, but few will download because of that,
> I guess).

I expect Neil will elaborate on the new library that produced them, and 
"DrRacket uses them" can be attached to that item.

Ryan