<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Do note that any function that is dynamically linked to your program is reached through an indirect jump. This is probably what David means when he says that it uses dynamic dispatch.<br class=""><div class="">
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<br class=""><div><blockquote type="cite" class=""><div class="">Le 26 janv. 2016 à 22:48:49, Trent Nadeau via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> a écrit :</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Okay. That makes more sense. I was wondering where you would even have dynamic dispatch to a normal function.</div><div class="gmail_extra"><br class=""><div class="gmail_quote">On Tue, Jan 26, 2016 at 10:46 PM, Jordan Rose <span dir="ltr" class=""><<a href="mailto:jordan_rose@apple.com" target="_blank" class="">jordan_rose@apple.com</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word" class=""><span class=""><br class=""><div class=""><blockquote type="cite" class=""><div class="">On Jan 26, 2016, at 19:45 , Jordan Rose <<a href="mailto:jordan_rose@apple.com" target="_blank" class="">jordan_rose@apple.com</a>> wrote:</div><br class=""><div class=""><div style="word-wrap:break-word" class=""><br class=""><div class=""><blockquote type="cite" class=""><div class="">On Jan 26, 2016, at 18:49 , David Turnbull via swift-evolution <<a href="mailto:swift-evolution@swift.org" target="_blank" class="">swift-evolution@swift.org</a>> wrote:</div><br class=""><div class=""><div dir="ltr" class="">Functions in a module go through dynamic dispatch. Operators are functions. So multiplying two complex numbers won't get inlined. The stdlib uses internal tricks so what appears as a module you import is available to be specialized and inlined.<div class=""><br class=""></div><div class="">To see this in action, try the CubeWorld demo from here: <a href="https://github.com/AE9RB/SwiftGL" style="font-size:13px" target="_blank" class="">https://github.com/AE9RB/SwiftGL</a></div><div class="">Then change it so the math libraries aren't modules (move the files, delete the import statements). On my system, CPU drops from 60% to 6%. It's also the difference between 150 cubes and 1200 cubes at 60 fps. Make sure you turn on WMO.</div><div class=""><br class=""></div><div class="">I'm told it won't always be this way. But it is today.</div></div></div></blockquote><br class=""></div><div class="">Yep. We're planning to improve this but right now it's true: inlining and generic specialization does not happen across framework boundaries.</div></div></div></blockquote><br class=""></div></span><div class="">Only the generics are really "dynamic dispatch", though. Non-generic code is just "function calls that aren't inlined".</div><span class="HOEnZb"><font color="#888888" class=""><div class=""><br class=""></div><div class="">Jordan</div><br class=""></font></span></div></blockquote></div><br class=""><br clear="all" class=""><div class=""><br class=""></div>-- <br class=""><div class="gmail_signature">Trent Nadeau</div>
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