one more thing ... I believe this will impact arrow function too since is basically bound callbacks all over the place (or at least this is how I believe it will be transpiled)
On Fri, Jul 12, 2013 at 4:57 PM, Andrea Giammarchi < [email protected]> wrote: > just to add some extra info to this discussion, lo-dash does some crazy > thing to optimize at its best bound functions. > > `/\bthis\b/.test(Function.prototype.toString.call(callback))` or something > similar to check if the function needs to use call/apply at all, together > with the number of arguments, and some other analysis to optimize all > further calls to the bound function. > > While I believe that's a bit extreme, I have to admit performance gain is > huge so maybe some trick used in lo-dash could be used internally too ? > Like different specialized bound version? Most common use case is still a > method bound to the object itself in order to don't loose the context on > some event call. > > my 2 cents > > > > > > On Fri, Jul 12, 2013 at 4:04 PM, Matthew Robb <[email protected]>wrote: > >> If a function proxy is just forwarding an operation through an >> intermediary (the proxy and it's call trap) to another function it sounds >> very similar to a regularly wrapped/bound js function. So what I am saying >> is if browsers implemented bind using a proxy instead of the special native >> functions it would be theoretically faster. >> >> >> On Fri, Jul 12, 2013 at 2:54 PM, Allen Wirfs-Brock <[email protected] >> > wrote: >> >>> >>> On Jul 12, 2013, at 1:55 PM, Matthew Robb wrote: >>> >>> > In the future wouldn't using a Function Proxy be potentially much >>> faster? >>> >>> It seems highly unlikely that any use of Proxy will be faster than a >>> rough equivalent using an ordinary object. >>> >>> I expect proxies to be much harder for implementations to optimized than >>> ordinary objects. >>> >>> Looking at it another way, if implementation haven't found it >>> straightforward to optimize ES5 bound functions why would you expect that >>> would have an easier time with Proxys? >>> >>> Allen >>> >>> >>> >> >> >> -- >> - Matthew Robb >> >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> >> >
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