> what exactly is it trying to do? The only changes I can notice are:
> - the bytecode interpreter and the eval and funcall functions now
> check two values rather than one, thus being slower.
> - read_char tests gc_cons_threshold.
> There is code that temporarily changes gc_cons_threshold to prevent
> GC from occurring. It was broken and caused an infinite recursion.
I thought I had carefully updated it to change
gc_cons_combined_threshold instead.
> I think this is the clean fix.
OK.
> The slowdown is surely insignificant.
I'd expect it to be measurable since it's executed at the very least least
once per iteration of any loop.
Stefan
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