This release brings first-party Godot support and major WebSocket performance improvements. We've also landed significant pipeline optimizations, commitlog enhancements, and expanded our framework coverage.

Features

First-party Godot SDK and Blackholio Tutorial

SpacetimeDB now officially supports Godot with a complete C# SDK integration. The new Blackholio tutorial walks through building a multiplayer asteroids-style game, demonstrating best practices for entity replication, player input handling, and game state management in Godot (#4920).

spacetime new --template godot-cs

Faster WebSocket Transport with Batched Responses

The WebSocket layer now pipelines and batches responses using the v3 protocol, significantly reducing per-message overhead under high load. Combined with pipelined JavaScript module operations (#4962), WASM module operations (#4973), and a fully pipelined WebSocket send path (#5051), this delivers substantially improved throughput for real-time applications.

HTTP/2 Backend Support

The SpacetimeDB server now supports HTTP/2, enabling more efficient client connections with multiplexed streams and header compression (#5027).

Vue useProcedure Hook

Following the React pattern, Vue developers now have a first-class useProcedure composable for calling SpacetimeDB procedures with full TypeScript support (#4999).

Unity 6 WebGL Compatibility

C# modules and clients now support Unity 6's WebGL runtime, automatically selecting between getWasmTableEntry and dynCall as appropriate for the Unity version (#4961).

Commitlog Performance and Operations

The durability layer gained several improvements:

• Configurable commitlog compression knobs for operational tuning (#5074)
• Compression deferred when under write load to prioritize throughput (#4974)
• Non-blocking compression that doesn't hold locks (#4981)
• Proper handling of empty tail segments on resumption (#4863)

Rust DbContext Generics

Rust modules can now be generic over DbContext, enabling code reuse between client and server contexts while maintaining type safety (#4707).

API Changes

• Deprecated: ReducerContext::identity is deprecated in favor of database_identity to clarify that this represents the module's identity, not the caller's (#4843)

Bug Fixes

• Fixed a segfault in the V8 JavaScript runtime that could crash the server (#4986)
• Fixed connection lifecycle callbacks not firing correctly in all disconnection scenarios (#4935)
• Fixed panics during unsubscribe operations (#4938)
• Fixed view auto-migration when using canonical names (#4985)
• Eliminated unnecessary msync calls on the entire offset index file, improving write performance (#5018)
• Fixed directory fsync issues on Windows snapshots (#4939)
• Fixed auth error details leaking in debug output (#5000)
• Prepared statements are now properly rolled back on transaction failure (#4979)

Infrastructure

• Client binaries are now distributed from AWS instead of DigitalOcean for improved reliability (#5077)
• Internal: cargo ci dlls renamed to cargo regen csharp dlls (#4972)

What's Changed

• Remove old script by @bfops in #4928
• CI - C# test scripts accept SPACETIMEDB_SERVER_URL override by @bfops in #4929
• Add railway section to the docs by @aasoni in #4904
• fix: connection lifecycle callbacks by @onx2 in #4935
• [Rust] Add possibility to be generic over DbContext by @kistz in #4707
• fix(update): check version exists before confirming uninstall by @euxaristia in #4774
• Deprecate ReducerContext::identity in favor of database_identity by @Mr-Dust0 in #4843
• CI - Try to fix Internal Tests on master by @bfops in #4942
• CI - version upgrade check happens in ci.yml by @bfops in #4950
• fix: unsubscribe panics by @onx2 in #4938
• Fix some warnings in C# by @bfops in #4956
• commitlog: Basic write throughput benchmarks by @kim in #3838
• Minor docs additions based on a discussion in the public Discord by @gefjon in #4963
• Remove distributed benchmark harness by @joshua-spacetime in #4967
• Pipeline js module operations by @joshua-spacetime in #4962
• commitlog: Handle empty tail segments upon resumption by @kim in #4863
• Update keynote readme with updated benchmark figures by @joshua-spacetime in #4975
• Defer commitlog compression when under load by @joshua-spacetime in #4974
• [C#] [Unity 6] Added logic to use either getWasmTableEntry or dynCall for C# WebGL by @rekhoff in #4961
• Pipeline wasm module operations by @joshua-spacetime in #4973
• Compression stats and commitlog compression function by @kim in #4708
• cargo ci dlls -> cargo regen csharp dlls by @bfops in #4972
• CI - Fix gen-quickstart check by @bfops in #4977
• Rollback prepared statements by @joshua-spacetime in #4979
• commitlog: Don't lock while compressing by @kim in #4981
• Fix segfault in v8 by @coolreader18 in #4986
• Use cli.toml for default start listen address by @0monish in #4900
• Do not defer commitlog compression by @joshua-spacetime in #4987
• snapshot: Don't fsync directories on Windows by @kim in #4939
• Docs: Update docs to new designs by @clockwork-tien in #4917
• LLM Benchmark Improvements + More Evals by @bradleyshep in #4740
• Avoid leaking auth error debug output by @clockwork-labs-bot in #5000
• Abstract SnapshotWorker and durability::Local by @Shubham8287 in #4982
• added useProcedure export to tanstack index file (#4957) by @ClemensWon in #4984
• Keynote 2 benchmark updates & refinements by @bradleyshep in #4997
• CI - enforce minimum pnpm package age by @bfops in #5032
• Do not msync the entire offset index file on every transaction by @joshua-spacetime in #5018
• Pipeline the websocket send path by @joshua-spacetime in #5051
• Fix view auto-migrate with canonical names by @JasonAtClockwork in #4985
• Add vue useProcedure hook by @kistz in #4999
• Client binaries from DigitalOcean -> AWS by @bfops in #5077
• Add commitlog knobs to server config by @joshua-spacetime in #5074
• Batch websocket responses using the v3 protocol by @joshua-spacetime in #5061
• Undo .npmrc in templates by @bfops in #5084
• chore: enable HTTP/2 support for backend server by @onx2 in #5027
• Drop serde_json arbitrary_precision from workspace by @clockwork-labs-bot in #5001
• CI - DOCKERHUB_PASSWORD -> DOCKERHUB_TOKEN by @bfops in #5096
• Document Steam Session Tickets authentication with SpacetimeAuth by @JulienLavocat in #4908
• Revert recursive mounts from module def by @aasoni in #5098
• Docs: Fix double logos when docs loading by @clockwork-tien in #5101
• Godot SDK and Blackholio tutorial by @lisandroct in #4920
• Update broken links in csharp SDK README by @jdetter in #4952

New Contributors

• @onx2 made their first contribution in #4935
• @euxaristia made their first contribution in #4774
• @Mr-Dust0 made their first contribution in #4843
• @0monish made their first contribution in #4900
• @ClemensWon made their first contribution in #4984
• @lisandroct made their first contribution in #4920

Full Changelog: v2.2.0...v2.3.0