chore(NODE-6733): add cpu bench test

Author: nbbeeken

test/benchmarks/driver_bench/src/suites/single_bench/primes.mts

@@ -0,0 +1,48 @@
+import assert from 'node:assert/strict';
+
+const findPrimesBelow = 290_000;
+const expectedPrimes = 25_224;
+
+// byteLength of BSON.serialize({ primes: Buffer.from(new Int32Array(sieveOfEratosthenes(290_000)).buffer) })
+// a bin data of int32s
+const byteLength = 100914;
+
+export const taskSize = 1.0091400000000001; // ~1MB worth of work
+
+assert.equal(taskSize, byteLength * 10e-6); // taskSize should stay hardcoded, checking here the math is done right.
+
+/** @see https://en.wikipedia.org/wiki/Sieve_of_Eratosthenes */
+function sieveOfEratosthenes(n: number) {
+  // Create a boolean array "prime[0..n]" and initialize
+  // all entries as true. A value in prime[i] will
+  // become false if i is Not a prime
+  const prime = Array.from({ length: n + 1 }, () => true);
+
+  // We know 0 and 1 are not prime
+  prime[0] = false;
+  prime[1] = false;
+
+  for (let p = 2; p * p <= n; p++) {
+    // If prime[p] is not changed, then it is a prime
+    if (prime[p] === true) {
+      // Update all multiples of p as false
+      for (let i = p * p; i <= n; i += p) {
+        prime[i] = false;
+      }
+    }
+  }
+
+  // Collecting all prime numbers
+  const primes = [];
+  for (let i = 2; i <= n; i++) {
+    if (prime[i] === true) {
+      primes.push(i);
+    }
+  }
+
+  return primes;
+}
+
+export async function run() {
+  assert.equal(sieveOfEratosthenes(findPrimesBelow).length, expectedPrimes);
+}