Run results for: Local scope vs outer scope variables

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36

Browser: Chrome 142

Operating system: Linux

Device Platform: Desktop

Date tested: 6 months ago

Benchmark engine: Benchmark.js

Do not cache at all

58.4M/s

Cache in the inner scope

31.9M/s

View exact numbers

Test name	Executions per second
✓ Do not cache at all	58,415,420 Ops/sec
Cache in the inner scope	31,898,638 Ops/sec

Script Preparation code:

var testVar = 10;

Tests:

Cache in the inner scope
function doTest1(){ var sum = 0; for (var i = 0; i < testVar; i++){ sum = sum + i; } } doTest1();
Do not cache at all
function doTest2(){ var sum = 0; var testVarLocal = testVar; for (var i = 0; i < testVarLocal; i++){ sum = sum + i; } } doTest2();