How does serialization performance compare between `long` and `double` in Java?

General Discussions
, ,
3

Been optimizing serialization pipelines in Java for over a decade — and yeah, the built-in serialization is bulky.

Tom’s approach is solid, but here’s a slight tweak if performance is really critical. Java’s default serialization comes with a lot of overhead. If you want raw speed in the java long vs double performance test, ditch ObjectOutputStream and try DataOutputStream.

// Java Serialization Benchmark using DataOutputStream
// ...
// [Include your original DataOutputStreamTest code here]

:sparkles: Why this matters:

  • DataOutputStream writes pure bytes — no class metadata, no bloat.
  • It’s snappier and more predictable.
  • long still edges out double, but the margin is tighter now. When you need high-throughput data serialization, this lightweight approach is the way to go.