Test mapping over object

Benchmark created on

Setup

const data = {
  a: new Date(),
  b: new Date(),
  c: new Date(),
  d: new Date(),
  e: new Date(),
  f: new Date()
};

Teardown

delete data;

Test runner

Ready to run.

Testing in
TestOps/sec
Spread entries
JSON.stringify({
  ...Object.entries(data).map(([k, v]) => ({ k: v.toISOString() }))
});
ready
Spread keys
JSON.stringify({
  ...Object.keys(data).map((k) => ({ k: data[k].toISOString() }))
});
ready
fromEntries entries
JSON.stringify(
  Object.fromEntries(Object.entries(data).map(([k, v]) => [k, v.toISOString()]))
);
ready
fromEntries keys
JSON.stringify(
  Object.fromEntries(Object.keys(data).map((k) => [k, data[k].toISOString()]))
);
ready
Reduce entries
JSON.stringify(
  Object.entries(data).reduce((acc, [k, v]) => {
    acc[k] = v.toISOString();
    return acc;
  }, {})
);
ready
Reduce keys
JSON.stringify(
  Object.keys(data).reduce((acc, k) => {
    acc[k] = data[k].toISOString();
    return acc;
  }, {})
);
ready
forEach entries
const rv = {};
Object.entries(data).forEach(([k, v]) => (rv[k] = v.toISOString()));
JSON.stringify(rv);
ready
forEach keys
const rv = {};
Object.keys(data).forEach((k) => (rv[k] = data[k].toISOString()));
JSON.stringify(rv);
ready
forOf entries
const rv = {};
for (const [k, v] of Object.entries(data)) {
  rv[k] = v.toISOString();
}
JSON.stringify(rv);
ready
forOf keys
const rv = {};
for (const k of Object.keys(data)) {
  rv[k] = data[k].toISOString();
}
JSON.stringify(rv);
ready

Revisions

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