On Wed, Sep 11, 2013 at 9:08 AM, Tom Van Cutsem <[email protected]> wrote: > Currently the pattern for this is [[Get]]+[[Call]]. We cannot refactor to > [[Has]] + [[Invoke]] in general, because [[Has]] will return true also for > non-callable values. > > If we believe these are call-sites where it is worth avoiding the allocation > of a function, then having an additional internal method like [[GetMethod]] > or [[InvokeConditional]] makes sense, but I doubt it's worth the added > complexity.
But as Allen said, [[Invoke]] is not a performance hack. It's a correctness hack. It permits proxies to customize their behavior around `this`, and even naive .invoke trap users would definitely want those customizations to apply for implicit .toString() and .then(). -j _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
