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BUG: irr function inconsistent behavior on different cpu architecture #131
Description
Describe the issue:
Hi, I noticed that npf.irr function could return different results on different cpus in some cases. The results would match if i run irr function more than once. Please see example below.
Reproduce the code example:
python -c "import numpy_financial as npf; amount = 37155; month_count = 144; monthly_payment = 560; npf.irr([-amount] + [monthly_payment] * int(month_count)); print(npf.irr([-amount] + [monthly_payment] * int(month_count)))"
python -c "import numpy_financial as npf; amount = 37155; month_count = 144; monthly_payment = 560; print(npf.irr([-amount] + [monthly_payment] * int(month_count)))"Error message:
On aws ec2 6i instance with Intel Ice Lake, I got the following:
0.01258179635558565
0.01258179635558565
On aws ec2 7i instance with Intel Sapphire Rapids, I got the following:
0.01258179635558565
0.006850691458678115Runtime information:
1.23.5
3.10.14 | packaged by conda-forge | (main, Mar 20 2024, 12:45:18) [GCC 12.3.0]
Context for the issue:
No response
Activity
TCYTseven commentedon Oct 23, 2024
Fixed this in Pull Request 132