Reduce Rust-Python inter-op cost significantly

.pre-commit-config.yaml

@@ -39,7 +39,7 @@ repos:
     -   id: cargo-clippy-fix
         name: cargo clippy fix
         language: rust
-        entry: cargo clippy --manifest-path=light-curve/Cargo.toml --all-targets --fix --allow-dirty
+        entry: cargo clippy --manifest-path=light-curve/Cargo.toml --all-targets --fix --allow-dirty --allow-staged
         files: \.rs
         pass_filenames: false
     -   id: cargo-clippy-check

CHANGELOG.md

@@ -25,7 +25,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
---
+- Reduce Rust-Python inter-op cost for numpy arrays significantly. It dropped from ~4 μs per array to ~100ns. https://github.com/light-curve/light-curve-python/pull/174
 
 ### Security
 

light-curve/src/check.rs

@@ -4,14 +4,14 @@ use itertools::Itertools;
 use light_curve_feature::Float;
 use ndarray::{ArrayView1, Zip};
 
-pub fn is_sorted<T>(a: &[T]) -> bool
+pub(crate) fn is_sorted<T>(a: &[T]) -> bool
 where
     T: PartialOrd,
 {
     a.iter().tuple_windows().all(|(a, b)| a < b)
 }
 
-pub fn check_sorted<T>(a: &[T], sorted: Option<bool>) -> Res<()>
+pub(crate) fn check_sorted<T>(a: &[T], sorted: Option<bool>) -> Res<()>
 where
     T: PartialOrd,
 {
@@ -32,7 +32,7 @@ where
     }
 }
 
-pub fn check_finite<T>(a: ArrayView1<'_, T>) -> Res<()>
+pub(crate) fn check_finite<T>(a: ArrayView1<'_, T>) -> Res<()>
 where
     T: Float,
 {
@@ -45,7 +45,7 @@ where
     }
 }
 
-pub fn check_no_nans<T>(a: ArrayView1<'_, T>) -> Res<()>
+pub(crate) fn check_no_nans<T>(a: ArrayView1<'_, T>) -> Res<()>
 where
     T: Float,
 {