In general, times reported in DrRacket are unreliable.
See:
https://docs.racket-lang.org/guide/performance.html#%28part._.Dr.Racket-perf%29
Try the command line. Here's what I get on my machine:
$ ~/racket61/bin/racket
Welcome to Racket v6.1.
-> (define (total n)
(for/sum ([x (in-range (+ 1 n))]) x))
-> (time (total 1000000000))
cpu time: 3044 real time: 3051 gc time: 0
500000000500000000
$ ~/racket62/bin/racket
Welcome to Racket v6.2.
-> (define (total n)
(for/sum ([x (in-range (+ 1 n))]) x))
-> (time (total 1000000000))
cpu time: 3036 real time: 3046 gc time: 0
500000000500000000
$ ~/racket63/bin/racket
Welcome to Racket v6.3.
-> (define (total n)
(for/sum ([x (in-range (+ 1 n))]) x))
-> (time (total 1000000000))
cpu time: 3040 real time: 3045 gc time: 0
500000000500000000
$ ~/racket64/bin/racket
Welcome to Racket v6.4.
-> (define (total n)
(for/sum ([x (in-range (+ 1 n))]) x))
-> (time (total 1000000000))
cpu time: 3036 real time: 3041 gc time: 0
500000000500000000
On Wed, Mar 2, 2016 at 1:31 PM, Matthias Felleisen <matth...@ccs.neu.edu> wrote:
>
> It sounds like your files are not compiled. Try
>
> raco setup
>
> in a shell. You may need to supply some command line flags if your files are
> half way compiled.
>
> (Your examples runs in 3200 ms on my Mac in Racket 6.4.1)
>
>
>
> On Mar 2, 2016, at 1:26 PM, vkelmenson via Racket Users
> <racket-users@googlegroups.com> wrote:
>
>> On Tuesday, March 1, 2016 at 10:51:58 PM UTC-5, vkelm...@aol.com wrote:
>>> I recently downloaded Racket version 6.4. I have previously been using
>>> version 6.1. It is much slower than version 6.1. Several short functions
>>> run approx 20 times slower on 6.4 than 6.1. These were run at the same time
>>> on the sam matine in succession.
>>> I am using Mac osX version 10.8.5
>>> Has anyone else noticed this?
>>
>> (define (total n)
>> (for/sum ([x (in-range (+ 1 n))]) x))
>> (time (total 1000000000))
>> in Racket 6.1 just now 5287 milliseconds. In Racket 6.4 102384 milliseconds.
>> Also: When I am typing in the interactions pane of 6.4 there is often a 1-2
>> second delay before my
>> keystrokes show up.
>>
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