Fetch API & Handling JSON Responses

What optimization technique is demonstrated here?

const cache = new Map();
async function fetchWithCache(url, options = {}) {
  if (!options.bypassCache && cache.has(url)) {
    return cache.get(url);
  }
  const response = await fetch(url, options);
  const data = await response.json();
  if (!options.bypassCache) {
    cache.set(url, data);
  }
  return data;
}

Request compression
Response validation
In-memory response caching
This implements in-memory response caching: 1) Caches responses by URL in memory, 2) Avoids unnecessary network requests, 3) Provides option to bypass cache when needed, 4) Improves application performance, 5) Useful for frequently accessed data, 6) Basic implementation of the cache-first strategy.
Request batching

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