Run results for: Local storage vs memory

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.2

Device Platform: Mobile

Date tested: one year ago

Benchmark engine: Benchmark.js

In Memory

732K/s

Local Storage

374K/s

View exact numbers

Test name	Executions per second
✓ In Memory	732,039 Ops/sec
Local Storage	374,364 Ops/sec

Script Preparation code:

window.localStorage.setItem("data", '{"attributes.support_case_state":{"type":"string_or_null_array","value":["open"]},"attributes.tier":{"type":"string_or_null_array","value":["tier_1"]},"attributes.user_persona":{"type":"string_or_null_array","value":["rider"]},"attributes.country_code":{"type":"string_or_null_array","value":["az"]},"attributes.city_id":{"type":"number_or_null_array","value":[211]},"attributes.safety_severity_level":{"type":"string_or_null_array","value":["minor"]}}');

var memoryData = JSON.parse('{"attributes.support_case_state":{"type":"string_or_null_array","value":["open"]},"attributes.tier":{"type":"string_or_null_array","value":["tier_1"]},"attributes.user_persona":{"type":"string_or_null_array","value":["rider"]},"attributes.country_code":{"type":"string_or_null_array","value":["az"]},"attributes.city_id":{"type":"number_or_null_array","value":[211]},"attributes.safety_severity_level":{"type":"string_or_null_array","value":["minor"]}}');

Tests:

Local Storage
Object.fromEntries(Object.entries(JSON.parse(window.localStorage.getItem("data"))).map((key, value) => [key, value]));
In Memory
Object.fromEntries(Object.entries(memoryData).map((key, value) => [key, value]));