Use cache for OpExpr #19523
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Use cache for OpExpr #19523
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
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Fixes #14978
This is irrelevant for self-check (and for most code likely), but it is important for numerical code, where it avoids exponential slowdown in formulas involving arrays etc (see e.g. the original issue).
Unless there will be fallout in
mypy_primerand/or there are objections, I am going to go ahead and merge it.