[squeak-dev] Re: 64 bit images (was Re: The Trunk:
David T. Lewis
lewis at mail.msen.com
Mon Jan 4 17:27:25 UTC 2010
On Mon, Jan 04, 2010 at 06:49:53PM +0200, Igor Stasenko wrote:
> why its not using
> SmalltalkImage current vmParameterAt: 40
> all the time?
> Why keeping this excessive information in ivar/classvar and inventing
> workarounds how to update it
> carefully because of SystemTracer mangling?
Normally that would be the right thing to do, but in the case of
#initialPC the performance impact of the primitive call has a significant
impact. Eliot was quite keen to make sure we did not add that overhead
in the #initialPC call, hence the class variable to save the value.
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