Memory Management & Garbage Collection

What memory optimization could improve this code?
function processData(data) {
  // Create a million element array
  const processed = new Array(1000000).fill(0).map((_, i) => data[i % data.length]);
  
  return processed.length;
}

function handleRequest(request) {
  const result = processData(request.data);
  return { result };
}
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