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ant/examples/spec/performance.js
da28911c0817bytecode

performance.js
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			import { test, summary } from './helpers.js';

			console.log('Performance Tests\n');

			test('performance exists', typeof performance, 'object');
			test('performance toStringTag', Object.prototype.toString.call(performance), '[object Performance]');

			const t1 = performance.now();
			test('now returns number', typeof t1, 'number');
			test('now returns positive', t1 >= 0, true);

			let sum = 0;
			for (let i = 0; i < 10000; i++) sum += i;
			const t2 = performance.now();
			test('now advances', t2 >= t1, true);

			test('timeOrigin exists', typeof performance.timeOrigin, 'number');
			test('timeOrigin positive', performance.timeOrigin > 0, true);
			test('timeOrigin before now', performance.timeOrigin <= Date.now(), true);

			summary();

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