Hi Darren, thanks for the link to the repo. I cloned it, successfully played
with and without sound on a mac book -- inside of drracket and from the command
line-- and never observed a load over 60% for drracket and ditto for plain
racket. That doesn't mean that your 100% problem doesn't exist, it's just that
I can't reproduce it.
A couple of comments on the code:
-- I'd place the main function at the top of the function section of the file
right below the constant definitions and data definitions
[I modified 2e to bring this across but you might be reading the stable
version.]
-- I also run (main initial-state) out of the repl not the main buffer.
-- Your file is missing tests.
-- Some functions are also missing proper signatures and purpose statements.
But I know "it works" see my homepage :-)
-- Matthias
On Dec 29, 2014, at 10:46 AM, Darren Cruse wrote:
> Re:
> Could you post the code somewhere so we can experiment with it?
>
> Here it is it's all in one file:
> pong-world.rkt
>
> On Mon, Dec 29, 2014 at 8:05 AM, Matthias Felleisen <[email protected]>
> wrote:
>
> On Dec 28, 2014, at 9:51 PM, Darren Cruse wrote:
>
>> One thing I can see is that on-draw is called for every on-tick on all three
>> platforms btw.
>>
>> And even in cases where the program is idling and on-tick has simply
>> returned the world state it was given unmodified.
>>
>> Is that normal I wonder? Part of me thought that since to-draw is a
>> function of the world state, and the world state hasn't changed, that it
>> would *not* call to-draw in that case.
>
> I experimented with this 'optimization' and, if I recall correctly, it didn't
> make much of a difference and got in the way of imperative world programs. So
> I took it out. Mea culpa, I should have commented on this experiment inside
> the code.
>
>
>
>> (but it calls to-draw for every on-tick even on the Windows machine which is
>> using only 6% cpu - so maybe I'm wrong to look to that as the problem)
>
>
> My Mac-based experiments suggest that this call is not the cause of
> performance problems.
>
> ;; ---
>
> Could you post the code somewhere so we can experiment with it?
>
> Thanks -- Matthias
>
>
>
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