text: (() => {
  	const arr = Array.from({length: 10000}, () => 0);
  	let res;
  	const fx = {
  		fa: () => {
  			for (let i = 0; i < arr.length; i++) {
  				res = 0;
  				res = undefined;
  			}
  		},
  		fb: () => {
  			for (let i = 0; i < arr.length; i++) {
  				res = 0;
  				res = void 0;
  			}
  		}
  	};
  	const test = (name, fx) => {
  		if (!(fx instanceof Function)) {
  			return;
  		}
  		const b = new Date();
  		for (let i = 0; i < 1000; i++) {
  			fx();
  		}
  		const t = new Date() - b;
  		console.log(`${name}: ${t}μs`);
  	};
  	Object.entries(fx).forEach(e => test(e[0], e[1]));
  })();
  