diff --git a/lib/node_modules/@stdlib/utils/group-by/benchmark/benchmark.js b/lib/node_modules/@stdlib/utils/group-by/benchmark/benchmark.js
index 2e07d06f6db4..1608631cfee5 100644
--- a/lib/node_modules/@stdlib/utils/group-by/benchmark/benchmark.js
+++ b/lib/node_modules/@stdlib/utils/group-by/benchmark/benchmark.js
@@ -21,8 +21,7 @@
 // MODULES //
 
 var bench = require( '@stdlib/bench' );
-var randu = require( '@stdlib/random/base/randu' );
-var floor = require( '@stdlib/math/base/special/floor' );
+var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
 var pkg = require( './../package.json' ).name;
 var groupBy = require( './../lib' );
 
@@ -32,10 +31,8 @@ var groupBy = require( './../lib' );
 bench( pkg, function benchmark( b ) {
 	var vals;
 	var arr;
-	var len;
 	var o;
 	var i;
-	var j;
 
 	function indicator( v ) {
 		return v[ 0 ];
@@ -43,16 +40,12 @@ bench( pkg, function benchmark( b ) {
 
 	vals = [ 'beep', 'boop', 'foo', 'bar', 'woot' ];
 
-	arr = new Array( 100 );
-	len = arr.length;
-	for ( i = 0; i < len; i++ ) {
-		j = floor( randu()*vals.length );
-		arr[ i ] = vals[ j ];
-	}
+	arr = discreteUniform( 100, 0, vals.length-1, {
+		'dtype': 'generic'
+	});
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		j = floor( randu()*vals.length );
-		arr[ 0 ] = vals[ j ];
+		arr[ 0 ] = i % vals.length;
 		o = groupBy( arr, indicator );
 		if ( typeof o !== 'object' ) {
 			b.fail( 'should return an object' );
@@ -70,10 +63,8 @@ bench( pkg+'::values', function benchmark( b ) {
 	var opts;
 	var vals;
 	var arr;
-	var len;
 	var o;
 	var i;
-	var j;
 
 	function indicator( v ) {
 		return v[ 0 ];
@@ -84,16 +75,12 @@ bench( pkg+'::values', function benchmark( b ) {
 	opts = {
 		'returns': 'values'
 	};
-	arr = new Array( 100 );
-	len = arr.length;
-	for ( i = 0; i < len; i++ ) {
-		j = floor( randu()*vals.length );
-		arr[ i ] = vals[ j ];
-	}
+	arr = discreteUniform( 100, 0, vals.length-1, {
+		'dtype': 'generic'
+	});
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		j = floor( randu()*vals.length );
-		arr[ 0 ] = vals[ j ];
+		arr[ 0 ] = i % vals.length;
 		o = groupBy( arr, opts, indicator );
 		if ( typeof o !== 'object' ) {
 			b.fail( 'should return an object' );
@@ -111,10 +98,8 @@ bench( pkg+'::indices', function benchmark( b ) {
 	var opts;
 	var vals;
 	var arr;
-	var len;
 	var o;
 	var i;
-	var j;
 
 	function indicator( v ) {
 		return v[ 0 ];
@@ -125,16 +110,12 @@ bench( pkg+'::indices', function benchmark( b ) {
 	opts = {
 		'returns': 'indices'
 	};
-	arr = new Array( 100 );
-	len = arr.length;
-	for ( i = 0; i < len; i++ ) {
-		j = floor( randu()*vals.length );
-		arr[ i ] = vals[ j ];
-	}
+	arr = discreteUniform( 100, 0, vals.length-1, {
+		'dtype': 'generic'
+	});
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		j = floor( randu()*vals.length );
-		arr[ 0 ] = vals[ j ];
+		arr[ 0 ] = i % vals.length;
 		o = groupBy( arr, opts, indicator );
 		if ( typeof o !== 'object' ) {
 			b.fail( 'should return an object' );
@@ -152,10 +133,8 @@ bench( pkg+'::pairs', function benchmark( b ) {
 	var opts;
 	var vals;
 	var arr;
-	var len;
 	var o;
 	var i;
-	var j;
 
 	function indicator( v ) {
 		return v[ 0 ];
@@ -166,16 +145,12 @@ bench( pkg+'::pairs', function benchmark( b ) {
 	opts = {
 		'returns': '*'
 	};
-	arr = new Array( 100 );
-	len = arr.length;
-	for ( i = 0; i < len; i++ ) {
-		j = floor( randu()*vals.length );
-		arr[ i ] = vals[ j ];
-	}
+	arr = discreteUniform( 100, 0, vals.length-1, {
+		'dtype': 'generic'
+	});
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		j = floor( randu()*vals.length );
-		arr[ 0 ] = vals[ j ];
+		arr[ 0 ] = i % vals.length;
 		o = groupBy( arr, opts, indicator );
 		if ( typeof o !== 'object' ) {
 			b.fail( 'should return an object' );
@@ -193,10 +168,8 @@ bench( pkg+'::this_context', function benchmark( b ) {
 	var opts;
 	var vals;
 	var arr;
-	var len;
 	var o;
 	var i;
-	var j;
 
 	function indicator( v ) {
 		return v[ 0 ];
@@ -207,16 +180,12 @@ bench( pkg+'::this_context', function benchmark( b ) {
 	opts = {
 		'thisArg': {}
 	};
-	arr = new Array( 100 );
-	len = arr.length;
-	for ( i = 0; i < len; i++ ) {
-		j = floor( randu()*vals.length );
-		arr[ i ] = vals[ j ];
-	}
+	arr = discreteUniform( 100, 0, vals.length-1, {
+		'dtype': 'generic'
+	});
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		j = floor( randu()*vals.length );
-		arr[ 0 ] = vals[ j ];
+		arr[ 0 ] = i % vals.length;
 		o = groupBy( arr, opts, indicator );
 		if ( typeof o !== 'object' ) {
 			b.fail( 'should return an object' );