Benchmark: BigInt to BigEndian Bytes (extended by trincot)

HTML Preparation code:

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

Script Preparation code:

function bigIntToBigEndianBytesLoopParseInt(value) {
    const hex = value.toString(16).padStart(16, '0');
    const bytes = new Uint8Array(8);
    for (let i = 0; i < 8; i++) {
        bytes[i] = parseInt(hex.slice(i * 2, i * 2 + 2), 16);
    }
    return bytes;
}

function bigIntToBigEndianBytesLoopConstructor(value) {
    const hex = value.toString(16).padStart(16, '0');
    const bytes = new Uint8Array(8);
    for (let i = 0; i < 8; i++) {
        bytes[i] = Number(hex.slice(i * 2, i * 2 + 2), 16);
    }
    return bytes;
}

function bigIntToBigEndianBytesDataView(value) {
    const buf = new ArrayBuffer(8);
    const view = new DataView(buf);

    view.setBigUint64(0, value);
    return new Uint8Array(buf);
}

function bigIntToUint8ArrayDirectConstructor(value) {
    const result = new Uint8Array(8);
    result[7] = Number(value & 0xffn);
    result[6] = Number((value >> 8n) & 0xffn);
    result[5] = Number((value >> 16n) & 0xffn);
    result[4] = Number((value >> 24n) & 0xffn );
    result[3] = Number((value >> 32n) & 0xffn);
    result[2] = Number((value >> 40n) & 0xffn);
    result[1] = Number((value >> 48n) & 0xffn);
    result[0] = Number((value >> 56n) & 0xffn);
    return result;
}

// Added by trincot: first split BigInt into two numbers (32 bit), then work with those only
function bigIntToUint8ArrayDirectConstructor2(value) {
    const result = new Uint8Array(8);
    const low = Number(value & 0xffffffffn);
    const high = Number((value >> 32n) & 0xffffffffn); 
    result[7] = low & 0xff;
    result[6] = (low >> 8) & 0xff;
    result[5] = (low >> 16) & 0xff;
    result[4] = (low >> 24) & 0xff;
    result[3] = high & 0xff;
    result[2] = (high >> 8) & 0xff;
    result[1] = (high >> 16) & 0xff;
    result[0] = (high >> 24) & 0xff;
    return result;
}

function bigIntToUint8ArrayDirectParseInt(value) {
    const result = new Uint8Array(8);
    result[7] = parseInt(value & 0xffn);
    result[6] = parseInt((value >> 8n) & 0xffn);
    result[5] = parseInt((value >> 16n) & 0xffn);
    result[4] = parseInt((value >> 24n) & 0xffn );
    result[3] = parseInt((value >> 32n) & 0xffn);
    result[2] = parseInt((value >> 40n) & 0xffn);
    result[1] = parseInt((value >> 48n) & 0xffn);
    result[0] = parseInt((value >> 56n) & 0xffn);
    return result;
}

Tests:

Loop ParseInt
bigIntToBigEndianBytesLoopParseInt(32149814014n)
Loop Constructor
bigIntToBigEndianBytesLoopConstructor(32149814014n)
DataView
bigIntToBigEndianBytesDataView(32149814014n)
Direct Constructor
bigIntToUint8ArrayDirectConstructor(32149814014n)
Direct ParseInt
bigIntToUint8ArrayDirectParseInt(32149814014n)
Direct Constructor with split
bigIntToUint8ArrayDirectConstructor2(32149814014n)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Loop ParseInt
Loop Constructor
DataView
Direct Constructor
Direct ParseInt
Direct Constructor with split

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:145.0) Gecko/20100101 Firefox/145.0

Browser/OS: Firefox 145 on Mac OS X 10.15

View result in a separate tab

Direct Constructor with split

35.2M/s

Direct Constructor

8.8M/s

Loop ParseInt

4.8M/s

Direct ParseInt

4.7M/s

Loop Constructor

4.6M/s

DataView

3.5M/s

View exact numbers

Test name	Executions per second
✓ Direct Constructor with split	35,170,820 Ops/sec
Direct Constructor	8,822,615 Ops/sec
Loop ParseInt	4,838,594 Ops/sec
Direct ParseInt	4,661,772 Ops/sec
Loop Constructor	4,593,928 Ops/sec
DataView	3,482,706 Ops/sec

BigInt to BigEndian Bytes (extended by trincot) (version: 1)

Comparing performance of: `Loop ParseInt vs Loop Constructor vs DataView vs Direct Constructor vs Direct ParseInt vs Direct Constructor with split`

Created: one year ago by: Guest

Go to the latest result

Loop ParseInt

Loop Constructor

DataView

Direct Constructor

Direct ParseInt

Direct Constructor with split

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

BigInt to BigEndian Bytes (extended by trincot) (version: 1)

Comparing performance of: Loop ParseInt vs Loop Constructor vs DataView vs Direct Constructor vs Direct ParseInt vs Direct Constructor with split

Created: one year ago by: Guest

Go to the latest result

Loop ParseInt

Loop Constructor

DataView

Direct Constructor

Direct ParseInt

Direct Constructor with split

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `Loop ParseInt vs Loop Constructor vs DataView vs Direct Constructor vs Direct ParseInt vs Direct Constructor with split`