On 24 July 2017 at 10:47, Naveen Chawla <[email protected]> wrote: > If reducing the available feature set would increase performance then a > declaration to the browser to ignore deprecated features should be enough to > get this optimization, but only for this reason. > > But do we even know that there is any performance gain for doing so? > > I'm not bothered about browser code complexity to support old features - I > don't see that code anyway. I don't know to what extent other javascript > developers are bothered about it either.
Well, JavaScript developers may not bother about the complexity of browser code, though browser developers, or more generally spoken, JavaScript engine developers should care about the complexity of their code. Supporting old features may not only be a question of engine performance but also memory consumption and (download) sizes of their programs. So, it should be in their interest to deprecate misfeatures, even when it takes 5, 10, or 15 years until their usage drops enough so they can actually be removed. Sebastian _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
