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GUIDGenerator Logo GuidGenerator
  • Home
  • Tools
  • UUID v4 Generator
  • UUID v7 Generator
  • ULID Generator
  • NanoID Generator
  • UUID Decoder
  • UUID Validator

Engineering Blog

Deep dives into unique identifiers, database performance, and the real-world trade-offs of building distributed systems. From UUID internals to the migrations, benchmarks, and outages they've caused in production — this is where we write up what we've learned.

  • Why Switch From Auto-Increment IDs to UUIDs (and What Might Break)
  • The Great Index Fragmentation Debate: Do UUIDs Really Kill Performance?
  • Benchmark: UUID vs BIGINT Insert/Query Speed
  • How Big Tech Generates Unique IDs at Scale (Twitter Snowflake, Instagram)
  • 5 Real-World Bugs Caused by Bad UUID Implementations
  • Migrating a Legacy Database From Integer IDs to UUIDs: A Case Study
  • What's New in RFC 9562: UUID v6, v7, and v8 Explained
  • NanoID: Why Some Developers Are Ditching UUIDs for Shorter IDs
  • Common UUID Mistakes Developers Make (and How to Avoid Them)
  • UUID Collision Stories: When Astronomically Unlikely Still Happens

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