benchmark.preallocation.js

'use strict';

// MODULES //

var bench = require( '@stdlib/bench' );
var pkg = require( './../package.json' ).name;
var append = require( './../lib' );


// MAIN //

bench( pkg+'::float64array,preallocated', function benchmark( b ) {
	var arr;
	var buf;
	var i;

	buf = new ArrayBuffer( b.iterations*8*3 ); // 8 bytes per double
	arr = new Float64Array( buf, 0, 0 );

	b.tic();
	for ( i = 0; i < b.iterations; i++ ) {
		arr = append( arr, [ i, i+1, i+2 ] );
		if ( arr.length !== 3*(i+1) ) {
			b.fail( 'should have added an element' );
		}
	}
	b.toc();
	if ( arr.length !== b.iterations*3 ) {
		b.fail( 'should have added elements' );
	}
	b.pass( 'benchmark finished' );
	b.end();
});

bench( pkg+'::float64array,preallocated,no-wrapper', function benchmark( b ) {
	var append;
	var arr;
	var buf;
	var i;

	append = require( './../lib/append_typed_array.js' );

	buf = new ArrayBuffer( b.iterations*8*3 ); // 8 bytes per double
	arr = new Float64Array( buf, 0, 0 );

	b.tic();
	for ( i = 0; i < b.iterations; i++ ) {
		arr = append( arr, [ i, i+1, i+2 ] );
		if ( arr.length !== 3*(i+1) ) {
			b.fail( 'should have added an element' );
		}
	}
	b.toc();
	if ( arr.length !== b.iterations*3 ) {
		b.fail( 'should have added elements' );
	}
	b.pass( 'benchmark finished' );
	b.end();
});

bench( pkg+'::float64array,control,preallocated,constructor', function benchmark( b ) {
	var arr;
	var buf;
	var i;

	buf = new ArrayBuffer( b.iterations*8*3 ); // 8 bytes per double
	arr = new Float64Array( buf, 0, 0 );

	b.tic();
	for ( i = 0; i < b.iterations; i++ ) {
		// Here, we are only testing the operation of creating a new view each time a value must be added to a typed array:
		arr = new Float64Array( arr.buffer, arr.byteOffset, 3*(i+1) );
		if ( arr.length !== 3*(i+1) ) {
			b.fail( 'should have added an element' );
		}
	}
	b.toc();
	if ( arr.length !== b.iterations*3 ) {
		b.fail( 'should have added elements' );
	}
	b.pass( 'benchmark finished' );
	b.end();
});

bench( pkg+'::float64array,control,preallocated,constructor,value', function benchmark( b ) {
	var arr;
	var buf;
	var i;
	var j;

	buf = new ArrayBuffer( b.iterations*8*3 ); // 8 bytes per double
	arr = new Float64Array( buf, 0, 0 );

	b.tic();
	for ( i = 0; i < b.iterations; i++ ) {
		arr = new Float64Array( arr.buffer, arr.byteOffset, 3*(i+1) );
		for ( j = 0; j < 3; j++ ) {
			arr[ (3*i)+j ] = i + j;
		}
		if ( arr.length !== 3*(i+1) ) {
			b.fail( 'should have added an element' );
		}
	}
	b.toc();
	if ( arr.length !== b.iterations*3 ) {
		b.fail( 'should have added elements' );
	}
	b.pass( 'benchmark finished' );
	b.end();
});