Speed up Vector.randomFilled

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 13.12.5
+- `Vector.randomFilled`:
+  - factory-constructor speed-up
+
 ## 13.12.4
 - `Vector.filled`:
   - factory-constructor speed-up

benchmark/vector/float32/vector_initializing/float32x4_random_filled.dart

@@ -1,5 +1,4 @@
-// Approx. 1.7 second (MacBook Pro 2019), Dart version: 2.16.0
-// Approx. 2.5 sec (MacBook Air mid 2017), Dart VM version: 2.16.0
+// Approx. 2.8 second (MacBook Pro 2019), Dart version: 3.2.4
 
 import 'package:benchmark_harness/benchmark_harness.dart';
 import 'package:ml_linalg/vector.dart';

lib/src/vector/float32x4_vector.dart

@@ -21,7 +21,6 @@ import 'package:ml_linalg/src/vector/serialization/vector_to_json.dart';
 import 'package:ml_linalg/src/vector/vector_cache_keys.dart';
 import 'package:ml_linalg/vector.dart';
 
-const _bytesPerElement = Float32List.bytesPerElement;
 const _bytesPerSimdElement = Float32x4List.bytesPerElement;
 const _bucketSize =
     Float32x4List.bytesPerElement ~/ Float32List.bytesPerElement;
@@ -32,12 +31,12 @@ class Float32x4Vector with IterableMixin<double> implements Vector {
       : length = source.length {
     _numOfBuckets = _getNumOfBuckets(source.length, _bucketSize);
 
-    final typedList = Float32List(_numOfBuckets * _bucketSize);
+    final list = Float32List(_numOfBuckets * _bucketSize);
 
-    _buffer = typedList.buffer;
+    _buffer = list.buffer;
 
     for (var i = 0; i < length; i++) {
-      typedList[i] = source[i].toDouble();
+      list[i] = source[i].toDouble();
     }
   }
 
@@ -54,16 +53,21 @@ class Float32x4Vector with IterableMixin<double> implements Vector {
           'Argument `min` should be less than `max`, min: $min, max: $max');
     }
 
+    if (length < 0) {
+      throw ArgumentError('Length cannot be negative');
+    }
+
     _numOfBuckets = _getNumOfBuckets(length, _bucketSize);
-    final byteData = ByteData(_numOfBuckets * _bytesPerSimdElement);
-    _buffer = byteData.buffer;
+
+    final list = Float32List(_numOfBuckets * _bucketSize);
+
+    _buffer = list.buffer;
 
     final generator = math.Random(seed);
     final diff = max - min;
 
     for (var i = 0; i < length; i++) {
-      byteData.setFloat32(_bytesPerElement * i,
-          generator.nextDouble() * diff + min, Endian.host);
+      list[i] = generator.nextDouble() * diff + min;
     }
   }
 
@@ -74,7 +78,9 @@ class Float32x4Vector with IterableMixin<double> implements Vector {
     }
 
     _numOfBuckets = _getNumOfBuckets(length, _bucketSize);
+
     final list = Float32x4List(_numOfBuckets);
+
     _buffer = list.buffer;
 
     final simdValue = Float32x4.splat(value.toDouble());

lib/src/vector/float64x2_vector.g.dart

@@ -24,7 +24,6 @@ import 'package:ml_linalg/src/vector/serialization/vector_to_json.dart';
 import 'package:ml_linalg/src/vector/vector_cache_keys.dart';
 import 'package:ml_linalg/vector.dart';
 
-const _bytesPerElement = Float64List.bytesPerElement;
 const _bytesPerSimdElement = Float64x2List.bytesPerElement;
 const _bucketSize =
     Float64x2List.bytesPerElement ~/ Float64List.bytesPerElement;
@@ -35,12 +34,12 @@ class Float64x2Vector with IterableMixin<double> implements Vector {
       : length = source.length {
     _numOfBuckets = _getNumOfBuckets(source.length, _bucketSize);
 
-    final typedList = Float64List(_numOfBuckets * _bucketSize);
+    final list = Float64List(_numOfBuckets * _bucketSize);
 
-    _buffer = typedList.buffer;
+    _buffer = list.buffer;
 
     for (var i = 0; i < length; i++) {
-      typedList[i] = source[i].toDouble();
+      list[i] = source[i].toDouble();
     }
   }
 
@@ -57,16 +56,21 @@ class Float64x2Vector with IterableMixin<double> implements Vector {
           'Argument `min` should be less than `max`, min: $min, max: $max');
     }
 
+    if (length < 0) {
+      throw ArgumentError('Length cannot be negative');
+    }
+
     _numOfBuckets = _getNumOfBuckets(length, _bucketSize);
-    final byteData = ByteData(_numOfBuckets * _bytesPerSimdElement);
-    _buffer = byteData.buffer;
+
+    final list = Float64List(_numOfBuckets * _bucketSize);
+
+    _buffer = list.buffer;
 
     final generator = math.Random(seed);
     final diff = max - min;
 
     for (var i = 0; i < length; i++) {
-      byteData.setFloat64(_bytesPerElement * i,
-          generator.nextDouble() * diff + min, Endian.host);
+      list[i] = generator.nextDouble() * diff + min;
     }
   }
 
@@ -77,7 +81,9 @@ class Float64x2Vector with IterableMixin<double> implements Vector {
     }
 
     _numOfBuckets = _getNumOfBuckets(length, _bucketSize);
+
     final list = Float64x2List(_numOfBuckets);
+
     _buffer = list.buffer;
 
     final simdValue = Float64x2.splat(value.toDouble());

pubspec.yaml

@@ -1,6 +1,6 @@
 name: ml_linalg
 description: SIMD-based linear algebra and statistics, efficient manipulation with numeric data
-version: 13.12.4
+version: 13.12.5
 homepage: https://github.com/gyrdym/ml_linalg
 
 environment: