I think we may be in the territory of pre-mature optimization. There is going to be a bit more overhead creating a copy-on-write object than a pass-by-reference object, but the real gains (over the old way) are going to be seen with objects that are “large”. If you run a profiler and need to improve a section of code, then this would be something to have in the toolbox. It probably isn’t a good practice to use everywhere since then you have to be careful about changing the value of a parameter.
It would be interesting to see that same piece of code run before the change. When did copy on write get introduced? On Mon, May 7, 2018 at 2:20 PM Richard Gaskin via use-livecode < use-livecode@lists.runrev.com> wrote: > Mark Wieder wrote: > > > On 05/06/2018 02:42 PM, Richard Gaskin via use-livecode wrote: > > > >> Did copy-on-write get changed in v9, or is the scope of its effects > >> just more limited than I had understood it to be? > > > > I'm still at the point of not trusting copy-on-write yet, but I think > > you're misinterpreting your results. If I'm understanding the way in > > which LC has implemented copy-on-write, then whether or not you use > > references in parameters, the "return p-1" code will have to make a > > copy on the stack to return a value - you can't just return a > > reference. So all you're changing by removing the "@" is one level of > > copying. > > That makes sense. Thanks. > > -- > Richard Gaskin > Fourth World Systems > Software Design and Development for the Desktop, Mobile, and the Web > ____________________________________________________________________ > ambassa...@fourthworld.com http://www.FourthWorld.com > > _______________________________________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode > _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
