feat: some moving around

app/src/lib/helpers/fastHash.test.ts

@@ -0,0 +1,11 @@
+import { test, expect } from 'vitest';
+import fastHash from './fastHash';
+
+test('Hashes dont clash', () => {
+  const hashA = fastHash('abcdef');
+  const hashB = fastHash('abcde');
+  const hashC = fastHash('abcde');
+
+  expect(hashA).not.toEqual(hashB);
+  expect(hashB).toEqual(hashC);
+});

app/src/lib/helpers/fastHash.ts

@@ -0,0 +1,14 @@
+// Shamelessly copied from
+// https://stackoverflow.com/a/8831937
+
+export default function (input: string) {
+  if (input.length === 0) return 0;
+
+  let hash = 0;
+  for (let i = 0; i < input.length; i++) {
+    hash = (hash << 5) - hash + input.charCodeAt(i);
+    hash = hash & hash;
+  }
+
+  return hash;
+}