fastHash

function fastHash(str, seed = 0) {
    const p1 = 2654435761 >>> 0; // Prime 1
    const p2 = 1597334677 >>> 0; // Prime 2
    const p3 = 2246822519 >>> 0; // Prime 3
    let h = seed + p1;

    let i = 0;
    const len = str.length;

    // Process 4 bytes at a time
    while (i + 4 <= len) {
        let k = (str.charCodeAt(i) & 0xff) |
                ((str.charCodeAt(i + 1) & 0xff) << 8) |
                ((str.charCodeAt(i + 2) & 0xff) << 16) |
                ((str.charCodeAt(i + 3) & 0xff) << 24);

        k = Math.imul(k, p2);
        h = Math.imul(h ^ (k >>> 16), p1);
        h = Math.imul(h ^ k, p3);
        i += 4;
    }

    // Handle remaining bytes
    while (i < len) {
        h ^= (str.charCodeAt(i) & 0xff);
        h = Math.imul(h, p1);
        i++;
    }

    // Finalization
    h ^= h >>> 13;
    h = Math.imul(h, p2);
    h ^= h >>> 16;

    return h >>> 0; // Ensure unsigned 32-bit
}

// Usage
const text = "Hello World";
console.log(fastHash(text)); // Outputs a number like 3894213542

// Test with multiple strings
const tests = ["Hello World", "Test String", "Another One"];
tests.forEach(str => {
    console.log(`${str}: ${fastHash(str)}`);
});