Benchmark: Uint8Array.fromBase64

HTML Preparation code:

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

Script Preparation code:

var fromBase64a = Uint8Array.fromBase64?.bind(Uint8Array);
var fromBase64b = ((b64) => {
    const binStr = atob(b64);
    const len = binStr.length;
    input = new Uint8Array(len);
    for (let i = 0; i < len; i++) input[i] = binStr.charCodeAt(i);
    return input;
});
var fromBase64c = (b64) => Uint8Array.from(atob(b64), c => c.charCodeAt(0));

function generateBase64TestSample({
    repeat = 1000,
    includeUnicode = true
} = {}) {
    const baseChunk = `
Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
0123456789 !@#$%^&*()_+-=[]{}|;:',.<>/? 
`;

    const unicodeChunk = `
Unicode test: 🚀🔥✨ café naïve 中文 العربية русский
`;

    const text =
        (baseChunk + (includeUnicode ? unicodeChunk : ""))
        .repeat(repeat)
        .trim();

    const base64 =
        typeof Buffer !== "undefined" ?
        Buffer.from(text, "utf-8").toString("base64") :
        btoa(unescape(encodeURIComponent(text)));

    return {
        originalText: text,
        base64,
        length: text.length,
        base64Length: base64.length
    };
}
var samples = new Array(30).fill(0).map(e => generateBase64TestSample());

Tests:

fromBase64a (Uint8Array.fromBase64)
for (let i = 0, l = samples.length; i < l; i++) { fromBase64a(samples[i].base64); }
fromBase64b (traditional)
for (let i = 0, l = samples.length; i < l; i++) { fromBase64b(samples[i].base64); }
fromBase64c (Uint8Array.from)
for (let i = 0, l = samples.length; i < l; i++) { fromBase64c(samples[i].base64); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
fromBase64a (Uint8Array.fromBase64)
fromBase64b (traditional)
fromBase64c (Uint8Array.from)

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 months ago)

User agent: Mozilla/5.0 (Android 15; Mobile; rv:148.0) Gecko/148.0 Firefox/148.0

Browser/OS: Firefox Mobile 148 on Android

View result in a separate tab

fromBase64a (Uint8Array.fromBase64)

91/s

fromBase64b (traditional)

11/s

fromBase64c (Uint8Array.from)

4/s

View exact numbers

Test name	Executions per second
✓ fromBase64a (Uint8Array.fromBase64)	91 Ops/sec
fromBase64b (traditional)	11 Ops/sec
fromBase64c (Uint8Array.from)	4 Ops/sec

Uint8Array.fromBase64 (version: 2)

Test Uint8Array.fromBase64 performance

Comparing performance of: `fromBase64a (Uint8Array.fromBase64) vs fromBase64b (traditional) vs fromBase64c (Uint8Array.from)`

Created: 5 months ago by: Registered User

Go to the latest result

fromBase64a (Uint8Array.fromBase64)

fromBase64b (traditional)

fromBase64c (Uint8Array.from)

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Uint8Array.fromBase64 (version: 2)

Test Uint8Array.fromBase64 performance

Comparing performance of: fromBase64a (Uint8Array.fromBase64) vs fromBase64b (traditional) vs fromBase64c (Uint8Array.from)

Created: 5 months ago by: Registered User

Go to the latest result

fromBase64a (Uint8Array.fromBase64)

fromBase64b (traditional)

fromBase64c (Uint8Array.from)

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `fromBase64a (Uint8Array.fromBase64) vs fromBase64b (traditional) vs fromBase64c (Uint8Array.from)`