Brandt Bucher <brandtbuc...@gmail.com> added the comment:

The attached PR doesn't seem to have any impact on Decimal performance 
(non-optimized, non-debug build on a fairly quiet laptop):

main:

Convert 262,000 Decimals to "small" ints: 31.7 ms +- 5.3 ms
Convert 256,000 Decimals to 1-digit ints: 29.9 ms +- 3.1 ms
Convert 256,000 Decimals to 2-digit ints: 30.4 ms +- 2.8 ms
Convert 256,000 Decimals to 3-digit ints: 31.2 ms +- 3.1 ms

patched:

Convert 262,000 Decimals to "small" ints: 30.9 ms +- 4.0 ms
Convert 256,000 Decimals to 1-digit ints: 29.5 ms +- 3.0 ms
Convert 256,000 Decimals to 1-digit ints: 30.5 ms +- 2.5 ms
Convert 256,000 Decimals to 1-digit ints: 31.0 ms +- 2.3 ms

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<https://bugs.python.org/issue46361>
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