Run results for: sum with typed int array vs standard array

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Sum with 8-bit array and loop

109K/s

Sum with standard array and loop

21K/s

Sum with standard array and reduce

18K/s

Sum with 8-bit array and reduce

7K/s

View exact numbers

Test name	Executions per second
✓ Sum with 8-bit array and loop	108,518 Ops/sec
Sum with standard array and loop	20,557 Ops/sec
Sum with standard array and reduce	17,972 Ops/sec
Sum with 8-bit array and reduce	6,836 Ops/sec

HTML Preparation code:

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

Script Preparation code:

function sumWithReduce(arr) {
    return arr.reduce((x, y) => (y = +y) ? x + y: x, 0)
}

function sumWithReduceInt16(arr) {
    return arr.reduce((x, y) => x + y, 0)
}

function sumWithLoop(arr) {
    let length = arr.length;
    let init = 0;
    let val;
    
    while (length--)
        if (val = +arr[length])
            init += val;
    
    return init; 
}

function sumWithLoopInt16(arr) {
    let length = arr.length;
    let init = 0;
    let val;
    
    while (length--)
    	init += val;
    
    return init; 
}

const nums = Array.from({length: 10000}, () => Math.floor(Math.random() * 65536))
// throw in some non numbers
nums[4] = '5'; nums[22] = NaN;
// coerces non numbers to zero
const numsInt = new Uint16Array(nums);

Tests:

Sum with 16-bit array and loop
sumWithLoopInt16(numsInt)
Sum with standard array and reduce
sumWithReduce(nums)
Sum with standard array and loop
sumWithLoop(nums)
Sum with 16-bit array and reduce
sumWithReduceInt16(numsInt)

Run results for: sum with typed int array vs standard array

testing performance of type arrays vs standard arrays

Sum with 16-bit array and loop

Sum with standard array and reduce

Sum with standard array and loop

Sum with 16-bit array and reduce