JS Map population performance

test.js

const functionOne = () => {
	const data = Array.from(Array(2000).keys());
	const a = new Map();
  
  	data.forEach(e => {
      a.set(e, {value: e + 1});
    });
  
  	return [...a.values()];
};

const functionTwo= () => {
	const data = Array.from(Array(2000).keys());
	const a = new Map(data.map(e => (
      [e, {value: e + 1}]
    )));
  
  	return [...a.values()];
};

const functionThree= () => {
	const data = Array.from(Array(2000).keys());
	const a = new Map();
	
	for (let i = 0; i < data.length; i++) {
		const e = data[i];
		a.set(e, {value: e + 1});
	}
  
  	return [...a.values()];
};

var iterations = 100000;
console.time('Function #1');
for(var i = 0; i < iterations; i++ ){
    functionOne();
};
console.timeEnd('Function #1')

console.time('Function #2');
for(var i = 0; i < iterations; i++ ){
    functionTwo();
};
console.timeEnd('Function #2')

console.time('Function #3');
for(var i = 0; i < iterations; i++ ){
    functionThree();
};
console.timeEnd('Function #3')

Top:
Function #3 (for): 13.600s (7352.94118 ops/sec)
Function #1 (array forEach): 13.843s (7223.86766 ops/sec)
Function #2 (map to entries): 19.523s (5122.1636 ops/sec)