refactor: use base array utility

Signed-off-by: Athan <kgryte@gmail.com>

Author: kgryte

lib/node_modules/@stdlib/utils/timeit/lib/main.js

@@ -27,6 +27,7 @@ var copy = require( '@stdlib/utils/copy' );
 var cwd = require( '@stdlib/process/cwd' );
 var format = require( '@stdlib/string/format' );
 var nextTick = require( '@stdlib/utils/next-tick' );
+var nulls = require( '@stdlib/array/base/nulls' );
 var defaults = require( './defaults.json' );
 var validate = require( './validate.js' );
 var evaluate = require( './vm_evaluate.js' );
@@ -83,7 +84,6 @@ function timeit( code, options, clbk ) {
 	var err;
 	var idx;
 	var cb;
-	var i;
 
 	if ( !isString( code ) ) {
 		throw new TypeError( format( 'invalid argument. First argument must be a string. Value: `%s`.', code ) );
@@ -101,10 +101,7 @@ function timeit( code, options, clbk ) {
 	if ( !isFunction( cb ) ) {
 		throw new TypeError( format( 'invalid argument. Callback argument must be a function. Value: `%s`.', cb ) );
 	}
-	results = [ ];
-	for ( i = 0; i < opts.repeats; i++ ) {
-		results[ i ] = 0;
-	}
+	results = nulls( opts.repeats );
 	dir = cwd();
 	idx = 0;