Hi Aaron, This is great news! I am wondering what the move to V8 means in terms of portability of Qt to platforms other than the ones listed in http://code.google.com/apis/v8/build.html. What about MIPS, SH4, pre-leopard Mac etc? Is the doc page is out of date or will QML not support these platforms?
Thanks, Girish On Tue, Jul 5, 2011 at 9:50 AM, <[email protected]> wrote: > Hi, > > Tomorrow we will merge the qtdeclarative.git#v8 branch into > qtdeclarative.git#master. This change switches the JavaScript engine QML > uses from JavaScript Core to V8 (http://code.google.com/p/v8/). > > In the past QML accessed the JavaScript engine indirectly through QtScript, > but with V8 we integrated it directly against V8's native C++ API. > Consequently, in addition to the raw JavaScript performance improvements we > get for "free", QML can leverage some of V8's unique features to give a > better JavaScript experience. > > In a perfect world, other than their apps running slightly faster, QML users > should notice no change. However, there are a couple of known regressions to > be aware of: > > 1. Creator integration will probably not work as smoothly in the short > term - at the very least the JavaScript debugging will not work. > 2. Any QML API that relies on QML's undocumented ability to set and get > QScriptValue properties will no longer work. > 3. Any application that provides a QScriptValue based QML module API will > no longer work. As module APIs are an unreleased feature anyway, hopefully > this wont be a big problem. > > If you encounter any other breakage, it is probably a bug - so please report > it! > > One goal in qt5 is to allow applications to expose their own JavaScript based > APIs to QML. Right now, it is not clear whether this will be accomplished by > porting all of QtScript to V8, or by exposing a new, smaller JavaScript API > that just wraps V8. If anyone has any strong opinions on the matter, now > would probably be a good opportunity to express them :) > > Cheers, > > Aaron > _______________________________________________ > Qt-qml mailing list > [email protected] > http://lists.qt.nokia.com/mailman/listinfo/qt-qml > _______________________________________________ Qt-qml mailing list [email protected] http://lists.qt.nokia.com/mailman/listinfo/qt-qml
