Run results for: web-crypto RSA

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
✓ sha512	81,436 Ops/sec
sha256	76,752 Ops/sec

Script Preparation code:

let key256, key512;

(async () => {
key256 = (await crypto.subtle.generateKey({
        name: 'RSASSA-PKCS1-v1_5',
        modulusLength: 2048,
        publicExponent: new Uint8Array([1, 0, 1]),
        hash: 'SHA-256',
    },
    false,
    ['sign', 'verify']
)).privateKey;

key512 = (await crypto.subtle.generateKey({
        name: 'RSASSA-PKCS1-v1_5',
        modulusLength: 2048,
        publicExponent: new Uint8Array([1, 0, 1]),
        hash: 'SHA-512',
    },
    false,
    ['sign', 'verify']
)).privateKey;
})();

async function sign256(path) {
    const encoder = new TextEncoder();
    const data = encoder.encode(path);
    const signature = await crypto.subtle.sign({
        name: 'RSASSA-PKCS1-v1_5'
    }, key256, data);
    const hashArray = Array.from(new Uint8Array(signature));
    const base64Hash = btoa(String.fromCharCode(...hashArray))

    return base64Hash + '/' + path;
}

async function sign512(path) {
    const encoder = new TextEncoder();
    const data = encoder.encode(path);
    const signature = await crypto.subtle.sign({
        name: 'RSASSA-PKCS1-v1_5'
    }, key512, data);
    const hashArray = Array.from(new Uint8Array(signature));
    const base64Hash = btoa(String.fromCharCode(...hashArray))

    return base64Hash + '/' + path;
}

Tests:

sha512
sign512('500x500/top/raw.githubusercontent.com/cshum/imagor/master/testdata/gopher.png').then(result => result)
sha256
sign256('500x500/top/raw.githubusercontent.com/cshum/imagor/master/testdata/gopher.png').then(result => result)

Run results for: web-crypto RSA

comparing sha256 vs sha512 performance based on https://www.measurethat.net/Benchmarks/Show/27514/3/web-crypto

sha512

sha256