Run results for: pedroac Fizz Buzz array allocation

Test name	Executions per second
push	1334655.6 Ops/sec
[i-1]	1389165.0 Ops/sec
new Array	1559667.2 Ops/sec
result.length	1472523.2 Ops/sec

push

const fizzBuzz = function(n) {
    const result = [];
    for (let i = 1; i <= n; ++i) {
        if (i % 15 === 0) {
            result.push('FizzBuzz');
        } else if (i % 3 === 0) {
            result.push('Fizz');
        } else if (i % 5 === 0) {
            result.push('Buzz');
        } else {
            result.push(i.toString());
        }
    }
    return result;
};
fizzBuzz(100);

[i-1]

const fizzBuzz = function(n) {
    const result = [];
    for (let i = 1; i <= n; ++i) {
        if (i % 15 === 0) {
            result[i-1] = 'FizzBuzz';
        } else if (i % 3 === 0) {
            result[i-1] = 'Fizz';
        } else if (i % 5 === 0) {
            result[i-1] = 'Buzz';
        } else {
            result[i-1] = i.toString();
        }
    }
    return result;
};
fizzBuzz(100);

new Array

const fizzBuzz = function(n) {
    const result = new Array(n);
    for (let i = 1; i <= n; ++i) {
        if (i % 15 === 0) {
            result[i-1] = 'FizzBuzz';
        } else if (i % 3 === 0) {
            result[i-1] = 'Fizz';
        } else if (i % 5 === 0) {
            result[i-1] = 'Buzz';
        } else {
            result[i-1] = i.toString();
        }
    }
    return result;
};
fizzBuzz(100);

result.length

const fizzBuzz = function(n) {
    const result = [];
    result.length = n;
    for (let i = 1; i <= n; ++i) {
        if (i % 15 === 0) {
            result[i-1] = 'FizzBuzz';
        } else if (i % 3 === 0) {
            result[i-1] = 'Fizz';
        } else if (i % 5 === 0) {
            result[i-1] = 'Buzz';
        } else {
            result[i-1] = i.toString();
        }
    }
    return result;
};
fizzBuzz(100);