Jakob> David Gregg (and friends) recently published a paper comparing Jakob> stack based and register based VMs for Java and found that Jakob> register based VMs were substantially faster. The main reason for Jakob> this appears to be the absence of the various LOAD_ instructions Jakob> in a register VM.
Back in the day (2001?) with the help of Tim Peters and others here I wrote most of what was necessary to convert from a stack-based to a register-based virtual machine for CPython. I had trouble with a couple VM instructions. If memory serves correctly, exec was a problem because it could push a variable number of results on the stack. I never completed the project because the instruction set kept growing and I couldn't keep up. Still, it looked promising because it avoided lots of intermediate loads and stores. Jakob> ``Cell'' is, unfortunately, hardcoded into Vmgen. I could either Jakob> patch that or run ceval-vm.i through sed or something. If the patch is to work and eventually be accepted it will have to be changed, probably with a little downstream find/replace. You might want to also file a bug report to the Vmgen folks. If Vmgen is generating these names the authors should really know to try to avoid name clashes. Skip _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com