I did a mini-experiment today, and was surprised.

Specifically, my guess was that changing the language of a file from 

#lang typed/racket


#lang typed/racket/base

and adding the newly-necessary requires:

(require racket/match

… would result in faster compile times and smaller .zo files. Neither of these 
was true; compilation time rose slightly, from about 3.35 seconds to about 3.45 
seconds, and the .zo file went from about 58K up to about 59K. 

I also tried to trim the imports by using ‘only-in’ and a local definition for 
‘natural’, leading to this replacement for the require:

(require racket/match
         (only-in racket/list first rest second third fourth group-by)

(define natural? exact-nonnegative-integer?)

… but the compilation time stayed about the same, and the generated .zo was 
about the same size.

I then checked on startup times for the compiled file, and they were apparently 
the same (0.57 seconds) for both versions. 

So, my question is this: does it actually make sense to spend time stripping 
down files from typed/racket to typed/racket/base? 

A related question with a possibly totally different answer: what about time 
spent stripping files down from racket to racket/base? Is this also not worth 



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