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unicode-org / icu4x

Solving i18n for client-side and resource-constrained environments.
https://icu4x.unicode.org
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Сalculation speed up for the Gregorian calendar #5849

Open Nikita-str opened 13 hours ago

Nikita-str commented 13 hours ago

Solving #5562 by implementing algo from the article for the Gregorian calendar. The article: "Euclidean Affine Functions and Applications to Calendar Algorithms" by Cassio Neri & Lorenz Schneider (Feb. 2021).

Draft PR: As I understand there is many places where parts of the logic is used and I only change the main file. Also need to run/writes benchmarks in the repo (by now, I run benches only in local pseudo repo where I test the algo). Also maybe with the same logic can be speeded up the Julian calendar.

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