<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Dec 28, 2014, at 9:51 PM, Darren Cruse wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: 'Lucida Grande'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div>One thing I can see is that on-draw is called for every on-tick on all three platforms btw.</div><div><br></div><div>And even in cases where the program is idling and on-tick has simply returned the world state it was given unmodified. </div><div><br></div><div>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.</div></span></blockquote><div><br></div><div>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. </div><div><br></div><div><br></div><div><br></div><blockquote type="cite">(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)</blockquote><br></div><div><br></div><div>My Mac-based experiments suggest that this call is not the cause of performance problems. </div><div><br></div><div>;; --- </div><div><br></div><div>Could you post the code somewhere so we can experiment with it? </div><div><br></div><div>Thanks -- Matthias</div><div><br></div><br></body></html>