Benchmark: jAg's comparison of unzipping, possibly modifying, and rezipping objects with 10,000 fields

jAg's comparison of unzipping, possibly modifying, and rezipping objects with 10,000 fields (version: 0)

You've got an object with a bunch of fields. You want to iterate through each field and if it matches a certain set of values/state, you want to modify it, and then get the final updated object (ie not just the updated values, but all the unchanged values too. The only thing that doesn't matter is the original value).

Comparing performance of: Object.entries -> map -> Object.fromEntries vs Object.entries -> reduce (single object) vs Object.entries -> map -> reduce (single object) vs Object.entries -> reduce (temporary objects) vs Object.entries -> map -> reduce (temporary objects) vs new map -> loop over object.entries -> Object.fromEntries

Created: one month ago by: Guest

Jump to the latest result

Script Preparation code:

data = {};
const ITERATIONS = 10_000;
for (i = 0; i < ITERATIONS; ++i) {
  data[i] = Math.random();
}

function switcher(i) {
  return i < 0.5 ? i : i.toString();
}

Tests:

Object.entries -> map -> Object.fromEntries
Object.fromEntries(Object.entries(data).map((key, value) => [key, switcher(value)]));
Object.entries -> reduce (single object)
Object.entries(data).reduce((acc, [k, v]) => { acc[k] = switcher(v) return acc; }, {});
Object.entries -> map -> reduce (single object)
Object.entries(data).map(([k, v]) => [k, switcher(v)]).reduce((acc, [k, v]) => { acc[k] = v return acc; }, {});
Object.entries -> reduce (temporary objects)
Object.entries(data).reduce((acc, [k, v]) => ({ ...acc, [k]: switcher(v) }), {});
Object.entries -> map -> reduce (temporary objects)
Object.entries(data).map(([k, v]) => [k, switcher(v)]).reduce((acc, [k, v]) => ({ ...acc, [k]: v }), {});
new map -> loop over object.entries -> Object.fromEntries
m = new Map(Object.entries(data)) for([k, v] of Object.entries(data)) { const newV = switcher(v); if (newV !== v) { m.set(k, newV); } } Object.fromEntries(m)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.entries -> map -> Object.fromEntries
Object.entries -> reduce (single object)
Object.entries -> map -> reduce (single object)
Object.entries -> reduce (temporary objects)
Object.entries -> map -> reduce (temporary objects)
new map -> loop over object.entries -> Object.fromEntries

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one month ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser/OS: Chrome 122 on Linux

View result in a separate tab

Test name	Executions per second
Object.entries -> map -> Object.fromEntries	39.1 Ops/sec
Object.entries -> reduce (single object)	169.0 Ops/sec
Object.entries -> map -> reduce (single object)	148.5 Ops/sec
Object.entries -> reduce (temporary objects)	19.0 Ops/sec
Object.entries -> map -> reduce (temporary objects)	19.8 Ops/sec
new map -> loop over object.entries -> Object.fromEntries	37.2 Ops/sec

jAg's comparison of unzipping, possibly modifying, and rezipping objects with 10,000 fields (version: 0)

Created: one month ago by: Guest

Jump to the latest result

Object.entries -> map -> Object.fromEntries

Object.entries -> reduce (single object)

Object.entries -> map -> reduce (single object)

Object.entries -> reduce (temporary objects)

Object.entries -> map -> reduce (temporary objects)

new map -> loop over object.entries -> Object.fromEntries

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A