[mypyc] feat: __mypyc_empty_tuple__ constant
#19654
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In 3.13 and later, we could use |
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I realized that any time a user has a kwarg-only call expression like
fn(abc=123, ...)in their compiled code, andfuncis not a native function, a new empty tuple is created every timeThis is not really necessary, we can just hold the same empty tuple in memory as a constant and pass it around. It's immutable, and that's already what we're already doing, since
tuple() is tuple()but our current method involves more steps.This should slightly improve the speed of kwarg-only python func calling.