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marshal_caching_simple_objects

📦 Simple Object Caching with Marshal​

Use Marshal to cache frequently used objects in memory or on disk. Because marshaled data is compact, it speeds up loading configurations or computed results. Just remember that only Ruby-built or user‑defined serializable classes work out of the box.

cache_file = "user_cache.bin"

# Populate cache if missing
data = if File.exist?(cache_file)
  File.open(cache_file, "rb") { |f| Marshal.load(f) }
else
  user_list = fetch_users_from_api()  # expensive call
  File.open(cache_file, "wb") { |f| f.write(Marshal.dump(user_list)) }
  user_list
end
puts "Loaded #{data.size} users from cache"