Add C extension for Chebyshev polynomial evaluation#69
Draft
rhannequin wants to merge 1 commit intomainfrom
Draft
Add C extension for Chebyshev polynomial evaluation#69rhannequin wants to merge 1 commit intomainfrom
rhannequin wants to merge 1 commit intomainfrom
Conversation
The Clenshaw recurrence in `ChebyshevPolynomial` is the innermost hot loop for every position query. This adds a small C extension that reimplements both `evaluate` and `evaluate_derivative`, yielding a 10-12x speedup on the micro-benchmark and 3-4x on the end-to-end compute hot path. The pure-Ruby implementation is kept as a fallback for platforms that cannot compile native extensions. The C extension is loaded via a `begin/rescue LoadError` at the bottom of `chebyshev_polynomial.rb`, transparently replacing the Ruby methods.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
The Clenshaw recurrence in
ChebyshevPolynomialis the innermost hot loop for every position query. This adds a small C extension that reimplements bothevaluateandevaluate_derivative, yielding a 10-12x speedup on the micro-benchmark and 3-4x on the end-to-end compute hot path.The pure-Ruby implementation is kept as a fallback for platforms that cannot compile native extensions. The C extension is loaded via a
begin/rescue LoadErrorat the bottom ofchebyshev_polynomial.rb, transparently replacing the Ruby methods.