Run results for: TypedArray slice vs subarray

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Whale/4.34.340.19 Safari/537.36

Browser: Chrome 140

Operating system: Windows

Device Platform: Desktop

Date tested: 8 months ago

testSubarray

147K/s

testSlice

84K/s

View exact numbers

Test name	Executions per second
✓ testSubarray	147,032 Ops/sec
testSlice	84,084 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

function testSlice() {
  (function () {
    const source = new Uint8Array(10000);
    for (let i = 0; i < 10000; i++) source[i] = i;

    // slice는 복사(copy) 발생
    const chunk = source.slice(1000, 9000);
  })();
}

function testSubarray() {
  (function () {
    const source = new Uint8Array(10000);
    for (let i = 0; i < 10000; i++) source[i] = i;

    // subarray는 zero-copy
    const chunk = source.subarray(1000, 9000);
  })();
}

Tests:

testSlice
testSlice()
testSubarray
testSubarray()