[racket] Super basic question about strings

On Nov 17, 2010, at 1:17 PM, Eli Barzilay wrote:

> 10 minutes ago, Matthias Felleisen wrote:
>> 
>> The bottleneck is format. [...]
> 
> The main bottleneck is using format with "~s" -- it's big enough to
> shadow other changes. 

Eli is correct. 

Changing from ~s to ~a makes ALL of our versions almost twice as fast as Neil's. 
Not using format at all is still the fastest way to go. 

Functional programming remains better than imperative programming.