fix: move random number generation outside benchmark loops

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---

Author: shraddha761

lib/node_modules/@stdlib/stats/base/dists/signrank/cdf/benchmark/benchmark.js

@@ -31,16 +31,23 @@ var cdf = require( './../lib' );
 // MAIN //
 
 bench( pkg, function benchmark( b ) {
-	var n;
+	var nValues;
+	var values;
 	var x;
-	var y;
 	var i;
+	var y;
+
+	values = new Array( b.iterations );
+	nValues = new Array( b.iterations );
+	for ( i = 0; i < b.iterations; i++ ) {
+		values[ i ] = uniform( 0.0, 20.0 );
+		nValues[ i ] = discreteUniform( 1, 20 );
+	}
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		x = uniform( 0.0, 20.0 );
-		n = discreteUniform( 1, 20 );
-		y = cdf( x, n );
+		x = values[ i ];
+		y = cdf( x, nValues[ i ] );
 		if ( isnan( y ) ) {
 			b.fail( 'should not return NaN' );
 		}
@@ -54,6 +61,7 @@ bench( pkg, function benchmark( b ) {
 });
 
 bench( pkg+':factory', function benchmark( b ) {
+	var values;
 	var mycdf;
 	var n;
 	var x;
@@ -63,9 +71,14 @@ bench( pkg+':factory', function benchmark( b ) {
 	n = 20;
 	mycdf = cdf.factory( n );
 
+	values = new Array( b.iterations );
+	for ( i = 0; i < b.iterations; i++ ) {
+		values[ i ] = uniform( 0.0, 20.0 );
+	}
+
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		x = uniform( 0.0, 20.0 );
+		x = values[ i ];
 		y = mycdf( x );
 		if ( isnan( y ) ) {
 			b.fail( 'should not return NaN' );

lib/node_modules/@stdlib/stats/base/dists/signrank/pdf/benchmark/benchmark.js

@@ -31,16 +31,21 @@ var pdf = require( './../lib' );
 // MAIN //
 
 bench( pkg, function benchmark( b ) {
-	var n;
-	var x;
+	var nValues;
+	var values;
 	var y;
 	var i;
 
+	values = new Array( b.iterations );
+	nValues = new Array( b.iterations );
+	for ( i = 0; i < b.iterations; i++ ) {
+		values[ i ] = uniform( 0.0, 10.0 );
+		nValues[ i ] = discreteUniform( 1, 20 );
+	}
+
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		x = uniform(0.0, 10.0);
-		n = discreteUniform( 1, 20 );
-		y = pdf( x, n );
+		y = pdf( values[ i ], nValues[ i ] );
 		if ( isnan( y ) ) {
 			b.fail( 'should not return NaN' );
 		}
@@ -54,19 +59,22 @@ bench( pkg, function benchmark( b ) {
 });
 
 bench( pkg+':factory', function benchmark( b ) {
+	var values;
 	var mypdf;
 	var n;
-	var x;
 	var y;
 	var i;
 
+	values = new Array( b.iterations );
+	for ( i = 0; i < b.iterations; i++ ) {
+		values[ i ] = uniform( 0.0, 20.0 );
+	}
 	n = 20;
 	mypdf = pdf.factory( n );
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		x = uniform(0.0, 20.0);
-		y = mypdf( x );
+		y = mypdf( values[ i ] );
 		if ( isnan( y ) ) {
 			b.fail( 'should not return NaN' );
 		}

lib/node_modules/@stdlib/stats/base/dists/signrank/quantile/benchmark/benchmark.js

@@ -21,11 +21,12 @@
 // MODULES //
 
 var bench = require( '@stdlib/bench' );
-var uniform = require( '@stdlib/random/base/uniform' );
-var randint = require( '@stdlib/random/base/discrete-uniform' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var uniform = require( '@stdlib/random/base/uniform' );
+var discreteUniform = require( '@stdlib/random/base/discrete-uniform' );
 var pkg = require( './../package.json' ).name;
 var quantile = require( './../lib' );
+var EPS = 1e-10;
 
 
 // MAIN //
@@ -38,8 +39,8 @@ bench( pkg, function benchmark( b ) {
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		p = uniform( 0.0, 1.0 );
-		n = randint( 1, 200 );
+		p = uniform( EPS, 1.0 );
+		n = discreteUniform( 1, 200 );
 		y = quantile( p, n );
 		if ( isnan( y ) ) {
 			b.fail( 'should not return NaN' );
@@ -65,7 +66,7 @@ bench( pkg+':factory', function benchmark( b ) {
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		p = uniform( 0.0, 1.0 );
+		p = uniform( EPS, 1.0 );
 		y = myquantile( p );
 		if ( isnan( y ) ) {
 			b.fail( 'should not return NaN' );