Collect files exact match using Map in Deno

collectExactMatchFiles.ts

const collectExactMatchFiles = async (p: string, cache: Map<string, string[]>) => {
  const collect = async (key: string) => {
    const c = await Deno.readTextFile(key);
    if (!cache.has(c)) {
      cache.set(c, [key]);
      return;
    }
    const e = cache.get(c);
    e && cache.set(c, [...e, key]);
  };

  const traverse = async (p: string) => {
    const entries = Deno.readDir(p);
    for await (const e of entries) {
      const compPath = `${p}/${e.name}`;
      if (e.isFile) {
        await collect(compPath);
      }
      if (e.isDirectory) {
        await traverse(compPath);
      }
    }
  };

  await traverse(p);
  return cache;
};

const TARGET_DIR = Deno.args[0];
console.time('time');
const result = await collectExactMatchFiles(TARGET_DIR, new Map<string, string[]>());
console.log(result);
console.timeEnd('time');