text: /**
  * @license Apache-2.0
  *
  * Copyright (c) 2019 The Stdlib Authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *    http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
  
  'use strict';
  
  // MODULES //
  
  var bench = require( '@stdlib/bench' );
  var isFunction = require( '@stdlib/assert/is-function' );
  var isBoolean = require( '@stdlib/assert/is-boolean' ).isPrimitive;
  var randu = require( '@stdlib/random/iter/randu' );
  var iterHead = require( './../../head' );
  var iterSomeBy = require( './../../some-by' );
  var iterThunk = require( './../../pipeline-thunk' );
  var pkg = require( './../package.json' ).name;
  var iterPipeline = require( './../lib' );
  
  
  // MAIN //
  
  bench( pkg+'::arguments', function benchmark( b ) {
  	var fcn;
  	var it1;
  	var it2;
  	var i;
  
  	it1 = iterThunk( iterHead, 10 );
  	it2 = iterThunk( iterSomeBy, 5, threshold );
  
  	b.tic();
  	for ( i = 0; i < b.iterations; i++ ) {
  		fcn = iterPipeline( it1, it2 );
  		if ( !isFunction( fcn ) ) {
  			b.fail( 'should return a function' );
  		}
  	}
  	b.toc();
  	if ( !isFunction( fcn ) ) {
  		b.fail( 'should return a function' );
  	}
  	b.pass( 'benchmark finished' );
  	b.end();
  
  	function threshold( r ) {
  		return ( r > 0.95 );
  	}
  });
  
  bench( pkg+'::array', function benchmark( b ) {
  	var args;
  	var fcn;
  	var it1;
  	var it2;
  	var i;
  
  	it1 = iterThunk( iterHead, 10 );
  	it2 = iterThunk( iterSomeBy, 5, threshold );
  	args = [ it1, it2 ];
  
  	b.tic();
  	for ( i = 0; i < b.iterations; i++ ) {
  		fcn = iterPipeline( args );
  		if ( !isFunction( fcn ) ) {
  			b.fail( 'should return a function' );
  		}
  	}
  	b.toc();
  	if ( !isFunction( fcn ) ) {
  		b.fail( 'should return a function' );
  	}
  	b.pass( 'benchmark finished' );
  	b.end();
  
  	function threshold( r ) {
  		return ( r > 0.95 );
  	}
  });
  
  bench( pkg+'::pipeline_throughput', function benchmark( b ) {
  	var bool;
  	var fcn;
  	var it0;
  	var it1;
  	var it2;
  	var i;
  
  	it0 = randu(); // infinite iterator which can be reused for each run
  	it1 = iterThunk( iterHead, 10 );
  	it2 = iterThunk( iterSomeBy, 5, threshold );
  	fcn = iterPipeline( it1, it2 );
  
  	b.tic();
  	for ( i = 0; i < b.iterations; i++ ) {
  		bool = fcn( it0 );
  		if ( !isBoolean( bool ) ) {
  			b.fail( 'should return a boolean' );
  		}
  	}
  	b.toc();
  	if ( !isBoolean( bool ) ) {
  		b.fail( 'should return a boolean' );
  	}
  	b.pass( 'benchmark finished' );
  	b.end();
  
  	function threshold( r ) {
  		return ( r > 0.95 );
  	}
  });
  