Diffusion Ant (type-hints-typescript) Code

ant/tests/bench_array_create.js
899dad6b8a9etype-hints-typescript

bench_array_create.js
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			/*
			* Array creation micro-bench
			*/

			function get_clock() {
			if (typeof performance !== 'undefined' && performance.now) return performance.now();
			return Date.now();
			}

			function run_case(name, fn, iters) {
			var i;
			var t0 = get_clock();
			for (i = 0; i < iters; i++) fn();
			var dt = get_clock() - t0;
			console.log(name + ': ' + dt.toFixed(2) + ' ms');
			}

			function create_assign() {
			var tab = [];
			for (var i = 0; i < 1000; i++) tab[i] = i;
			}

			function create_push() {
			var tab = [];
			for (var i = 0; i < 1000; i++) tab.push(i);
			}

			function create_prealloc_assign() {
			var tab = [];
			tab.length = 1000;
			for (var i = 0; i < 1000; i++) tab[i] = i;
			}

			function create_prealloc_push() {
			var tab = [];
			tab.length = 1000;
			for (var i = 0; i < 1000; i++) tab.push(i);
			}

			function main() {
			var iters = 200;
			run_case('create_assign', create_assign, iters);
			run_case('create_push', create_push, iters);
			run_case('create_prealloc_assign', create_prealloc_assign, iters);
			run_case('create_prealloc_push', create_prealloc_push, iters);

			var arr = [];
			var t0 = get_clock();
			for (var i = 0; i < 20000; i++) {
			arr.push(i);
			}
			var dt = get_clock() - t0;
			console.log('push_20k: ' + dt.toFixed(2) + ' ms');
			console.log('done, arr length: ' + arr.length);
			console.log('first element: ' + arr[0]);
			console.log('last element: ' + arr[19999]);
			}

			main();

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