Mark Shannon <[email protected]> added the comment:
If some misses are caused by mixed int/float operands, it might be worth
investigating whether these occur in loops.
Most JIT compilers perform some sort of loop peeling to counter this form of
type instability.
E.g.
x = 0
for ...
x += some_float()
`x` is an int for the first iteration, and a float for the others.
By unpeeling the first iteration, we get type stability in the loop
x = 0
#first iteration
x += some_float()
for ... #Remaining iterations
x += some_float() # x is always a float here.
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nosy: +Mark.Shannon
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Python tracker <[email protected]>
<https://bugs.python.org/issue45367>
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