fix: elkan means impl for some vector types (#472)

Signed-off-by: usamoi <usamoi@outlook.com>

Author: usamoi

crates/elkan_k_means/src/operator.rs

@@ -7,12 +7,7 @@ pub trait OperatorElkanKMeans: Operator {
     type VectorNormalized: VectorOwned;
 
     fn elkan_k_means_normalize(vector: &mut [Scalar<Self>]);
-    fn elkan_k_means_normalize2(vector: Borrowed<'_, Self>) -> Self::VectorNormalized;
     fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32;
-    fn elkan_k_means_distance2(
-        lhs: <Self::VectorNormalized as VectorOwned>::Borrowed<'_>,
-        rhs: &[Scalar<Self>],
-    ) -> F32;
 }
 
 impl OperatorElkanKMeans for BVecf32Cos {
@@ -22,17 +17,9 @@ impl OperatorElkanKMeans for BVecf32Cos {
         vecf32::l2_normalize(vector)
     }
 
-    fn elkan_k_means_normalize2(vector: Borrowed<'_, Self>) -> Vecf32Owned {
-        bvecf32::l2_normalize(vector)
-    }
-
     fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf32::dot(lhs, rhs).acos()
     }
-
-    fn elkan_k_means_distance2(lhs: Vecf32Borrowed<'_>, rhs: &[Scalar<Self>]) -> F32 {
-        vecf32::dot(lhs.slice(), rhs).acos()
-    }
 }
 
 impl OperatorElkanKMeans for BVecf32Dot {
@@ -42,17 +29,9 @@ impl OperatorElkanKMeans for BVecf32Dot {
         vecf32::l2_normalize(vector)
     }
 
-    fn elkan_k_means_normalize2(vector: Borrowed<'_, Self>) -> Vecf32Owned {
-        bvecf32::l2_normalize(vector)
-    }
-
     fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf32::dot(lhs, rhs).acos()
     }
-
-    fn elkan_k_means_distance2(lhs: Vecf32Borrowed<'_>, rhs: &[Scalar<Self>]) -> F32 {
-        vecf32::dot(lhs.slice(), rhs).acos()
-    }
 }
 
 impl OperatorElkanKMeans for BVecf32Jaccard {
@@ -62,37 +41,19 @@ impl OperatorElkanKMeans for BVecf32Jaccard {
         vecf32::l2_normalize(vector)
     }
 
-    fn elkan_k_means_normalize2(vector: Borrowed<'_, Self>) -> Vecf32Owned {
-        Vecf32Owned::new(vector.to_vec())
-    }
-
     fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf32::sl2(lhs, rhs).sqrt()
     }
-
-    fn elkan_k_means_distance2(lhs: Vecf32Borrowed<'_>, rhs: &[Scalar<Self>]) -> F32 {
-        vecf32::sl2(lhs.slice(), rhs).sqrt()
-    }
 }
 
 impl OperatorElkanKMeans for BVecf32L2 {
     type VectorNormalized = Vecf32Owned;
 
-    fn elkan_k_means_normalize(vector: &mut [Scalar<Self>]) {
-        vecf32::l2_normalize(vector)
-    }
-
-    fn elkan_k_means_normalize2(vector: Borrowed<'_, Self>) -> Vecf32Owned {
-        Vecf32Owned::new(vector.to_vec())
-    }
+    fn elkan_k_means_normalize(_: &mut [Scalar<Self>]) {}
 
     fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf32::sl2(lhs, rhs).sqrt()
     }
-
-    fn elkan_k_means_distance2(lhs: Vecf32Borrowed<'_>, rhs: &[Scalar<Self>]) -> F32 {
-        vecf32::sl2(lhs.slice(), rhs).sqrt()
-    }
 }
 
 impl OperatorElkanKMeans for SVecf32Cos {
@@ -102,19 +63,9 @@ impl OperatorElkanKMeans for SVecf32Cos {
         vecf32::l2_normalize(vector)
     }
 
-    fn elkan_k_means_normalize2(vector: Borrowed<'_, Self>) -> SVecf32Owned {
-        let mut vector = vector.for_own();
-        svecf32::l2_normalize(&mut vector);
-        vector
-    }
-
     fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf32::dot(lhs, rhs).acos()
     }
-
-    fn elkan_k_means_distance2(lhs: Borrowed<'_, Self>, rhs: &[Scalar<Self>]) -> F32 {
-        svecf32::dot_2(lhs, rhs).acos()
-    }
 }
 
 impl OperatorElkanKMeans for SVecf32Dot {
@@ -124,161 +75,86 @@ impl OperatorElkanKMeans for SVecf32Dot {
         vecf32::l2_normalize(vector)
     }
 
-    fn elkan_k_means_normalize2(vector: Borrowed<'_, Self>) -> SVecf32Owned {
-        let mut vector = vector.for_own();
-        svecf32::l2_normalize(&mut vector);
-        vector
-    }
-
     fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf32::dot(lhs, rhs).acos()
     }
-
-    fn elkan_k_means_distance2(lhs: Borrowed<'_, Self>, rhs: &[Scalar<Self>]) -> F32 {
-        svecf32::dot_2(lhs, rhs).acos()
-    }
 }
 
 impl OperatorElkanKMeans for SVecf32L2 {
     type VectorNormalized = Self::VectorOwned;
 
     fn elkan_k_means_normalize(_: &mut [Scalar<Self>]) {}
 
-    fn elkan_k_means_normalize2(vector: SVecf32Borrowed<'_>) -> SVecf32Owned {
-        vector.for_own()
-    }
-
     fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf32::sl2(lhs, rhs).sqrt()
     }
-
-    fn elkan_k_means_distance2(lhs: SVecf32Borrowed<'_>, rhs: &[Scalar<Self>]) -> F32 {
-        svecf32::sl2_2(lhs, rhs).sqrt()
-    }
 }
 
 impl OperatorElkanKMeans for Vecf16Cos {
     type VectorNormalized = Self::VectorOwned;
 
-    fn elkan_k_means_normalize(vector: &mut [F16]) {
+    fn elkan_k_means_normalize(vector: &mut [Scalar<Self>]) {
         vecf16::l2_normalize(vector)
     }
-
-    fn elkan_k_means_normalize2(vector: Vecf16Borrowed<'_>) -> Vecf16Owned {
-        let mut vector = vector.for_own();
-        vecf16::l2_normalize(vector.slice_mut());
-        vector
-    }
-
-    fn elkan_k_means_distance(lhs: &[F16], rhs: &[F16]) -> F32 {
+    fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf16::dot(lhs, rhs).acos()
     }
-
-    fn elkan_k_means_distance2(lhs: Vecf16Borrowed<'_>, rhs: &[F16]) -> F32 {
-        vecf16::dot(lhs.slice(), rhs).acos()
-    }
 }
 
 impl OperatorElkanKMeans for Vecf16Dot {
     type VectorNormalized = Self::VectorOwned;
 
-    fn elkan_k_means_normalize(vector: &mut [F16]) {
+    fn elkan_k_means_normalize(vector: &mut [Scalar<Self>]) {
         vecf16::l2_normalize(vector)
     }
 
-    fn elkan_k_means_normalize2(vector: Vecf16Borrowed<'_>) -> Vecf16Owned {
-        let mut vector = vector.for_own();
-        vecf16::l2_normalize(vector.slice_mut());
-        vector
-    }
-
-    fn elkan_k_means_distance(lhs: &[F16], rhs: &[F16]) -> F32 {
+    fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf16::dot(lhs, rhs).acos()
     }
-
-    fn elkan_k_means_distance2(lhs: Vecf16Borrowed<'_>, rhs: &[F16]) -> F32 {
-        vecf16::dot(lhs.slice(), rhs).acos()
-    }
 }
 
 impl OperatorElkanKMeans for Vecf16L2 {
     type VectorNormalized = Self::VectorOwned;
 
-    fn elkan_k_means_normalize(_: &mut [F16]) {}
-
-    fn elkan_k_means_normalize2(vector: Vecf16Borrowed<'_>) -> Vecf16Owned {
-        vector.for_own()
-    }
+    fn elkan_k_means_normalize(_: &mut [Scalar<Self>]) {}
 
-    fn elkan_k_means_distance(lhs: &[F16], rhs: &[F16]) -> F32 {
+    fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf16::sl2(lhs, rhs).sqrt()
     }
-
-    fn elkan_k_means_distance2(lhs: Vecf16Borrowed<'_>, rhs: &[F16]) -> F32 {
-        vecf16::sl2(lhs.slice(), rhs).sqrt()
-    }
 }
 
 impl OperatorElkanKMeans for Vecf32Cos {
     type VectorNormalized = Self::VectorOwned;
 
-    fn elkan_k_means_normalize(vector: &mut [F32]) {
+    fn elkan_k_means_normalize(vector: &mut [Scalar<Self>]) {
         vecf32::l2_normalize(vector)
     }
 
-    fn elkan_k_means_normalize2(vector: Vecf32Borrowed<'_>) -> Vecf32Owned {
-        let mut vector = vector.for_own();
-        vecf32::l2_normalize(vector.slice_mut());
-        vector
-    }
-
-    fn elkan_k_means_distance(lhs: &[F32], rhs: &[F32]) -> F32 {
+    fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf32::dot(lhs, rhs).acos()
     }
-
-    fn elkan_k_means_distance2(lhs: Vecf32Borrowed<'_>, rhs: &[F32]) -> F32 {
-        vecf32::dot(lhs.slice(), rhs).acos()
-    }
 }
 
 impl OperatorElkanKMeans for Vecf32Dot {
     type VectorNormalized = Self::VectorOwned;
 
-    fn elkan_k_means_normalize(vector: &mut [F32]) {
+    fn elkan_k_means_normalize(vector: &mut [Scalar<Self>]) {
         vecf32::l2_normalize(vector)
     }
 
-    fn elkan_k_means_normalize2(vector: Vecf32Borrowed<'_>) -> Vecf32Owned {
-        let mut vector = vector.for_own();
-        vecf32::l2_normalize(vector.slice_mut());
-        vector
-    }
-
-    fn elkan_k_means_distance(lhs: &[F32], rhs: &[F32]) -> F32 {
+    fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf32::dot(lhs, rhs).acos()
     }
-
-    fn elkan_k_means_distance2(lhs: Vecf32Borrowed<'_>, rhs: &[F32]) -> F32 {
-        vecf32::dot(lhs.slice(), rhs).acos()
-    }
 }
 
 impl OperatorElkanKMeans for Vecf32L2 {
     type VectorNormalized = Self::VectorOwned;
 
-    fn elkan_k_means_normalize(_: &mut [F32]) {}
-
-    fn elkan_k_means_normalize2(vector: Vecf32Borrowed<'_>) -> Vecf32Owned {
-        vector.for_own()
-    }
+    fn elkan_k_means_normalize(_: &mut [Scalar<Self>]) {}
 
     fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf32::sl2(lhs, rhs).sqrt()
     }
-
-    fn elkan_k_means_distance2(lhs: Vecf32Borrowed<'_>, rhs: &[Scalar<Self>]) -> F32 {
-        vecf32::sl2(lhs.slice(), rhs).sqrt()
-    }
 }
 
 impl OperatorElkanKMeans for Veci8Cos {
@@ -288,17 +164,9 @@ impl OperatorElkanKMeans for Veci8Cos {
         vecf32::l2_normalize(vector)
     }
 
-    fn elkan_k_means_normalize2(vector: Borrowed<'_, Self>) -> Veci8Owned {
-        vector.normalize()
-    }
-
     fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf32::dot(lhs, rhs).acos()
     }
-
-    fn elkan_k_means_distance2(lhs: Borrowed<'_, Self>, rhs: &[Scalar<Self>]) -> F32 {
-        veci8::dot_2(lhs, rhs).acos()
-    }
 }
 
 impl OperatorElkanKMeans for Veci8Dot {
@@ -308,35 +176,17 @@ impl OperatorElkanKMeans for Veci8Dot {
         vecf32::l2_normalize(vector)
     }
 
-    fn elkan_k_means_normalize2(vector: Borrowed<'_, Self>) -> Veci8Owned {
-        vector.normalize()
-    }
-
     fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf32::dot(lhs, rhs).acos()
     }
-
-    fn elkan_k_means_distance2(lhs: Borrowed<'_, Self>, rhs: &[Scalar<Self>]) -> F32 {
-        veci8::dot_2(lhs, rhs).acos()
-    }
 }
 
 impl OperatorElkanKMeans for Veci8L2 {
     type VectorNormalized = Self::VectorOwned;
 
-    fn elkan_k_means_normalize(vector: &mut [Scalar<Self>]) {
-        vecf32::l2_normalize(vector)
-    }
-
-    fn elkan_k_means_normalize2(vector: Borrowed<'_, Self>) -> Veci8Owned {
-        vector.normalize()
-    }
+    fn elkan_k_means_normalize(_: &mut [Scalar<Self>]) {}
 
     fn elkan_k_means_distance(lhs: &[Scalar<Self>], rhs: &[Scalar<Self>]) -> F32 {
         vecf32::sl2(lhs, rhs).sqrt()
     }
-
-    fn elkan_k_means_distance2(lhs: Borrowed<'_, Self>, rhs: &[Scalar<Self>]) -> F32 {
-        veci8::l2_2(lhs, rhs).sqrt()
-    }
 }

crates/ivf/src/ivf_naive.rs

@@ -146,11 +146,11 @@ pub fn make<O: Op, S: Source<O>>(path: &Path, options: IndexOptions, source: &S)
     let mut idx = vec![0usize; n as usize];
     idx.par_iter_mut().enumerate().for_each(|(i, x)| {
         rayon::check();
-        let vector = storage.vector(i as u32);
-        let vector = O::elkan_k_means_normalize2(vector);
+        let mut vector = storage.vector(i as u32).to_vec();
+        O::elkan_k_means_normalize(&mut vector);
         let mut result = (F32::infinity(), 0);
         for i in 0..nlist as usize {
-            let dis = O::elkan_k_means_distance2(vector.for_borrow(), &centroids[i]);
+            let dis = O::elkan_k_means_distance(&vector, &centroids[i]);
             result = std::cmp::min(result, (dis, i));
         }
         *x = result.1;
@@ -242,11 +242,12 @@ pub fn basic<O: Op>(
     nprobe: u32,
     mut filter: impl Filter,
 ) -> BinaryHeap<Reverse<Element>> {
-    let target = O::elkan_k_means_normalize2(vector);
+    let mut target = vector.to_vec();
+    O::elkan_k_means_normalize(&mut target);
     let mut lists = Vec::with_capacity(mmap.nlist as usize);
     for i in 0..mmap.nlist {
         let centroid = mmap.centroids(i);
-        let distance = O::elkan_k_means_distance2(target.for_borrow(), centroid);
+        let distance = O::elkan_k_means_distance(&target, centroid);
         lists.push((distance, i));
     }
     if nprobe < mmap.nlist {
@@ -274,11 +275,12 @@ pub fn vbase<'a, O: Op>(
     nprobe: u32,
     mut filter: impl Filter + 'a,
 ) -> (Vec<Element>, Box<(dyn Iterator<Item = Element> + 'a)>) {
-    let target = O::elkan_k_means_normalize2(vector);
+    let mut target = vector.to_vec();
+    O::elkan_k_means_normalize(&mut target);
     let mut lists = Vec::with_capacity(mmap.nlist as usize);
     for i in 0..mmap.nlist {
         let centroid = mmap.centroids(i);
-        let distance = O::elkan_k_means_distance2(target.for_borrow(), centroid);
+        let distance = O::elkan_k_means_distance(&target, centroid);
         lists.push((distance, i));
     }
     if nprobe < mmap.nlist {

crates/ivf/src/ivf_pq.rs

@@ -150,11 +150,11 @@ pub fn make<O: Op, S: Source<O>>(path: &Path, options: IndexOptions, source: &S)
     let mut idx = vec![0usize; n as usize];
     idx.par_iter_mut().enumerate().for_each(|(i, x)| {
         rayon::check();
-        let vector = storage.vector(i as u32);
-        let vector = O::elkan_k_means_normalize2(vector);
+        let mut vector = storage.vector(i as u32).to_vec();
+        O::elkan_k_means_normalize(&mut vector);
         let mut result = (F32::infinity(), 0);
         for i in 0..nlist as usize {
-            let dis = O::elkan_k_means_distance2(vector.for_borrow(), &centroids[i]);
+            let dis = O::elkan_k_means_distance(&vector, &centroids[i]);
             result = std::cmp::min(result, (dis, i));
         }
         *x = result.1;