Lagrange v0.3.3

Lagrange 0.3.3 — 2026-10-30 (experimental / alpha).

Scenario A transaction coordination fast-path and multi-system comparative
benchmark completion release reducing per-statement coordinator metadata
bookkeeping, overlapping independent participant BEGIN/PREPARE/COMMIT/ROLLBACK
stages, adding opt-in row-key-disjoint concurrent participant staging sessions,
reusing pre-validated compiled operations across staging replay, pruning
composite-key partitions by prefix and range, caching SQLite determinism
compilation plans, and completing Slices 3–5 of the comparative benchmark
matrix (epic scenario-a-transaction-coordination-fast-path):

Formation health at cut time: formation health: 0/20 passed (0%), 0 with a starved seed.

Added

• Scenario A transaction coordination fast path & telemetry (scenario-a-transaction-coordination-fast-path):
  Per-transaction phase and metadata telemetry (distributed-transaction-telemetry.js),
  reduced durable transaction bookkeeping (sql-query-engine-transaction-set-methods.js,
  distributed-transaction-participant-set.js, distributed-transaction-statement.js),
  concurrent independent participant BEGIN, PREPARE, COMMIT, and ROLLBACK
  stages (distributed-transaction-protocol.js), opt-in row-key-disjoint concurrent
  participant staging sessions (partition-participant-transaction-session.js),
  pre-validated compiled operation reuse and empty-read direct execution during
  staging replay (partition-participant-transaction-staging.js), composite
  partition prefix and range pruning (partition-resolver-composite.js,
  lagrange-oltp-adapter.js), and schema_version-fenced SQLite determinism
  plan caching plus Raft durable sync telemetry (partition-transaction-determinism.js,
  raft-rs-durable-store.js).
• Multi-system comparative benchmark matrix completion (#166–#168):
  Citus colocated tables and distributed functions comparison (Slice 3),
  YugabyteDB 2024.2 and Apache Ignite 3 colocated compute comparison (Slice 4),
  and Scenario C PostgreSQL + Valkey freshness-bounded risk comparison (Slice 5).

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Docker images (linux/amd64, distroless):

• docker.io/psvensson/lagrange:0.3.3 (Docker Hub)

Full history: CHANGELOG.md · process: RELEASE.md