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indexed for vs for...of
(version: 1)
Comparing performance of:
indexed for vs for...of
Created:
3 months ago
by:
Guest
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Script Preparation code:
"use strict"; const LEN = 1 << 18; // 262,144 const REPS = 32; // Deterministic PRNG (LCG) let seed = 0x12345678 | 0; const nextInt = () => (seed = (Math.imul(seed, 1664525) + 1013904223) | 0); const data = new Int32Array(LEN); for (let i = 0; i < LEN; i++) data[i] = nextInt(); globalThis.__benchSink = 0; const DATA = data; const N = LEN; const R = REPS;
Tests:
indexed for
let sum = 0; for (let r = 0; r < R; r++) { for (let i = 0; i < N; i++) { sum += DATA[i]; } } globalThis.__benchSink = sum;
for...of
let sum = 0; for (let r = 0; r < R; r++) { for (const v of DATA) { sum += v; } } globalThis.__benchSink = sum;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
indexed for
for...of
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
3 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36
Browser/OS:
Chrome 144 on Windows
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<iframe src="https://measurethat.net/Embed?id=624048" width="100%" height="500px"></iframe>
Test name
Executions per second
indexed for
90.0 Ops/sec
for...of
19.1 Ops/sec
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