refactor: avoid repeated temporary array allocation

Signed-off-by: Athan <[email protected]>

Author: kgryte

lib/node_modules/@stdlib/stats/base/dnanmeanpw/lib/ndarray.js

@@ -24,6 +24,11 @@ var dnannsumpw = require( '@stdlib/blas/ext/base/dnannsumpw' ).ndarray;
 var Float64Array = require( '@stdlib/array/float64' );
 
 
+// VARIABLES //
+
+var WORKSPACE = new Float64Array( 2 );
+
+
 // MAIN //
 
 /**
@@ -44,9 +49,10 @@ var Float64Array = require( '@stdlib/array/float64' );
 * // returns 1.25
 */
 function dnanmeanpw( N, x, strideX, offsetX ) {
-	var out = new Float64Array( 2 );
-	dnannsumpw( N, x, strideX, offsetX, out, 1, 0 );
-	return out[ 0 ] / out[ 1 ];
+	WORKSPACE[ 0 ] = 0.0;
+	WORKSPACE[ 1 ] = 0;
+	dnannsumpw( N, x, strideX, offsetX, WORKSPACE, 1, 0 );
+	return WORKSPACE[ 0 ] / WORKSPACE[ 1 ];
 }