Description

rhettinger

opened on Mar 13, 2023

Issue body actions

• Use sumprod() which is faster, simpler, and more accurate than rounding each multiplication before summation.
• For an additional speed-up and simplification, compute the (x_xi - bar) only once instead of multiple times.
• For Spearman's rank correlation, we can skip the (x_xi - bar) step because the ranks are centered around zero.

Linked PRs

• GH-102670: Use sumprod() to simplify, speed up, and improve accuracy of statistics functions #102649

Activity

1. rhettinger

   added

   performancePerformance or resource usagePerformance or resource usage

   3.12only security fixesonly security fixes

   on Mar 13, 2023
2. rhettinger

   added a commit that references this issue on Mar 14, 2023

   GH-102670: Use sumprod() to simplify, speed up, and improve accuracy …

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3. rhettinger

   closed this as completedon Mar 14, 2023
4. carljm

   added a commit that references this issue on Mar 14, 2023

   Merge branch 'main' into inlinecomp2

   6c5f269
5. Fidget-Spinner

   added a commit that references this issue on Mar 27, 2023

   pythonGH-102670: Use sumprod() to simplify, speed up, and improve acc…

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6. warsaw

   added a commit that references this issue on Apr 11, 2023

   pythonGH-102670: Use sumprod() to simplify, speed up, and improve acc…

   f767f4b

Issue actions