Benchmark: divide by 2 vs multiply by 0.5 - 1

Script Preparation code:

const length = 100000;
const tmp_nums=[];
for (let i = 0; i < length; i++) {
  tmp_nums.push(Date.now() + Math.random());
}
nums = [...tmp_nums];
nums_len = length;

Tests:

div by 2
const length = nums_len; for (let i = 0; i < length; i++) { nums[i] /= 2; }
div by 2.0
const length = nums_len; for (let i = 0; i < length; i++) { nums[i] /= 2.0; }
multiply by 0.5
const length = nums_len; for (let i = 0; i < length; i++) { nums[i] *= 0.5; }
bitwise
const length = nums_len; for (let i = 0; i < length; i++) { nums[i] = nums[i] >> 1; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
div by 2
div by 2.0
multiply by 0.5
bitwise

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser/OS: Chrome 109 on Linux

View result in a separate tab

Test name	Executions per second
div by 2	54.4 Ops/sec
div by 2.0	55.0 Ops/sec
multiply by 0.5	55.0 Ops/sec
bitwise	23.9 Ops/sec

divide by 2 vs multiply by 0.5 - 1 (version: 0)

Comparing performance of: div by 2 vs div by 2.0 vs multiply by 0.5 vs bitwise

Created: one year ago by: Guest

Jump to the latest result

div by 2

div by 2.0

multiply by 0.5

bitwise

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A