Subj : Re: can't understand difference in vars
To   : netscape.public.mozilla.jseng
From : "Jashin Eugene" <johny5@ngs.ru>
Date : Wed Mar 24 2004 02:25 pm

Thanks a lot, to all!

> JSBool MakeThree(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
> jsval *rval)
> {
>      return JS_NewNumberValue(cx, 3, rval);
> }
>
> As Marcello's followup points out, the internal representation of 3
> should be an int jsval, not a double jsval.  Calling JS_NewDouble to
> make a jsdouble allocated on the GC heap, just to contain a small
> integer, is wasteful, besides not resulting in the desired operation.
>
> Always use JS_NewNumberValue, as it can optimize numbers into ints
> instead of doubles where possible.
>
> /be

.