d6 1.0.0-rc4

The fourth release candidate for d6 1.0 keeps compact program metadata compact in memory, extending rc3's smaller bytecode caches and executables.

Smaller runtime metadata

String constants allocate their actual character count, and type sets allocate only their used members. Loading a compact program no longer expands each string into a mostly empty 4 KB buffer or each type set into eight member slots. Compiler, template and worker copies retain independent ownership of mutable metadata. Bytecode cache format 22 rebuilds older caches automatically.

Real application verification

Standalone Pheint and Skindicate servers were compared against rc3 with the JIT enabled, at one and four workers. Each case used warm-up, three one-minute load windows and quiet intervals, with real SQLite databases and populated APIs.

All eight runs passed response, write read-back and database integrity checks. Candidate memory stayed within the soak's growth limits after natural garbage collections. This bounded workstation measurement does not establish absence of every long-term leak; throughput differences were small and remain subject to laptop scheduling and power conditions. The full report records the source revisions, instrumentation, aggregate data and limits.

No bundled cuts changed. See the changelog for the complete changes. Release preparation does not update deployed services; the production record records actual deployments and backups.