chore: update factory code block

Author: Neerajpathak07

lib/node_modules/@stdlib/stats/base/dists/beta/logpdf/benchmark/benchmark.js

@@ -21,7 +21,6 @@
 // MODULES //
 
 var bench = require( '@stdlib/bench' );
-var randu = require( '@stdlib/random/base/randu' );
 var uniform = require( '@stdlib/random/base/uniform' );
 var Float64Array = require( '@stdlib/array/float64' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
@@ -73,6 +72,7 @@ bench( pkg+':factory', function benchmark( b ) {
 	var mylogpdf;
 	var alpha;
 	var beta;
+	var len;
 	var x;
 	var y;
 	var i;
@@ -81,10 +81,15 @@ bench( pkg+':factory', function benchmark( b ) {
 	beta = 55.54321;
 	mylogpdf = logpdf.factory( alpha, beta );
 
+	len = 100;
+	x = new Float64Array( len );
+	for ( i = 0; i < len; i++ ) {
+		x[ i ] = uniform( EPS, 2.0 );
+	}
+
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		x = ( randu()*2.0 ) + EPS;
-		y = mylogpdf( x );
+		y = mylogpdf( x[ i%100 ] );
 		if ( isnan( y ) ) {
 			b.fail( 'should not return NaN' );
 		}