On Mon, Sep 27, 2010 at 6:37 PM, Maciej Stachowiak <m...@apple.com> wrote:
> > On Sep 27, 2010, at 3:19 PM, Michael Nordman wrote: > > Webkit's XHR currently does not keep two copies of the data that I can see. > I think we should avoid that. > > > We could keep the raw data around, which hopefully is directly usable as an > ArrayBuffer backing store, and only translate it to text format when/if the > client requests responseText. > > It would be unfortunate to have to keep the raw data around after the page access .responseText, given that the overwhelming majority of pages will touch .responseText and nothing else. I found when improving the V8 XHR implementation that the memory footprint of .responseText being held off of the XHR object itself was often significant so I would be very reluctant to grow it by an addition 50-100% (depending on encoding) in the common case. - James
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