On Thu, 26 Nov 2009, Eliot Miranda wrote:
I wouldn't bother trying to fix the primitive. Both in VisualWorks and at Teleplace the experience has been the same, getting rid of the primitives for next, nextPut: and atEnd sped things up. The system is simply too complex nowadays for these primitives to pay for themselves because they only cover a small number of cases. The primitives support Array and ByteString bow there are so many different kinds of arrays being streamed over that the cost of primitive failures outweigh the benefits of primitive successes.
We are using these primitives in our own stream implementation like this:
next
<primitive: 65> [ position < readLimit ] whileFalse: [ self receiveData ]. ^buffer at: (position := position + 1)
And it does make a difference (buffer is a 8kiB sized ByteArray). Would this be faster without the primitive?
Levente