On Wed, Jan 15, 2014 at 1:26 PM, Allen Wirfs-Brock <al...@wirfs-brock.com> wrote: > So we discussed all that when we made that decision. I understand that you > disagree but is there any new data that should cause us to reopen an issue > that was already discussed and decided at a TC39 meeting?
Well, here's one data point. This function, like most Math functions, is particularly useful for systems that compile to JS, like Emscripten. See <https://bugzilla.mozilla.org/show_bug.cgi?id=925123>. Emscripten emits code (roughly) like this: function program() { var sin = Math.sin; ... lots of functions that call sin() ... return main; } This kind of code has nice tamper-resistant semantics and (not coincidentally) it will scream on existing JS engines. If clz is a Math function, Emscripten can just var clz = Math.clz; If it's a method, it would have to emit something like: var clz = Function.prototype.call.bind(Number.prototype.clz); and hope the JS engines all optimize away the bound method call. -j _______________________________________________ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
