Fast JSON and Furious Runtime

An airhacks.fm conversation with David Kral about: Helidon JSON and Helidon JSON Binding, compile-time JSON binding with annotation processors generating readable Java source code, no bytecode manipulation and no reflection, debuggable generated converters, comparison with Micronaut compile-time generation, why Helidon avoids the JSON-B API and its reflection overhead, a proposed bridge to the JSON-B API for stable standards-based code, serializing Java Records with the @Json.Entity annotation, a package-info annotation idea for processing an entire package, Boundary Control Entity (BCE) structure for entity records, JSON-P style JsonParser and JsonGenerator entry points, HashMap-like dynamic JSON objects for versioned and evolving APIs, a single centralized entry point for discoverability, grounding LLMs with Jakarta EE and MicroProfile standards to avoid hallucinations, reducing dependencies by letting LLMs generate helper methods, Java 25 source-mode scripting and simplified main replacing python scripts, zero-dependency JSON parsing with a forked org.json, JMH benchmarks showing Helidon JSON around 400% faster than Jackson and faster than yasson, energy and cost savings from faster serialization, object pooling and virtual-thread-friendly design with Scoped Values

David Kral on twitter: @VerdentDK