On 21 October 2014 22:31, Mark S. Miller <[email protected]> wrote: >> in saying that [weak maps] are not designed to work efficiently in that >> manner. > > Actually, they are. The problem is that initial implementations date from > before we appreciated the need for the transposed representation. The best > thing TC39 can do for the future of WeakMaps is to proceed assuming the > transposed representation.
While I sympathise, let me clarify that this still remains a conjecture. AFAIK, nobody has proved it empirically in a JS implementation yet, we don't know in detail how complex such an implementation would be, and what side effects it might have on general performance (e.g., via added polymorphism). It's most likely not as easy or as clear a win as you may think it is. /Andreas _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
