Run results for: Uint8Array.fromBase64

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Goanna/6.8 Firefox/128.0 PaleMoon/34.1.0a1

Browser: Pale Moon (Firefox Variant) 34

Operating system: Windows

Device Platform: Desktop

Date tested: 2 months ago

Test name	Executions per second
fromBase64a (Uint8Array.fromBase64)	0.0 Ops/sec
fromBase64b (traditional)	3.1 Ops/sec
fromBase64c (Uint8Array.from)	1.4 Ops/sec

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); }

Run results for: Uint8Array.fromBase64

Test Uint8Array.fromBase64 performance

fromBase64a (Uint8Array.fromBase64)

fromBase64b (traditional)

fromBase64c (Uint8Array.from)