Keynote Spacetime simulation comparisons

[bradleyshep]

Description of Changes

Adds a comprehensive benchmarking suite for comparing SpacetimeDB performance against other databases and backends.

Key features:

• Load testing framework that runs repeatable benchmarks across multiple connectors
• Supports SpacetimeDB, PostgreSQL, CockroachDB, SQLite, Supabase, Convex, and Bun
• Configurable test parameters: duration, concurrency, Zipf distribution (α) for hot/cold account skew
• Outputs JSON reports with TPS and latency statistics to ./runs/
• Docker Compose support for containerized benchmarking
• Includes a test SpacetimeDB Rust module (modules/test-1/server)

Connectors included:

• Direct SQL connectors (Postgres, CockroachDB, SQLite)
• Drizzle ORM wrappers
• RPC-based connectors for network-isolated benchmarking
• SpacetimeDB WebSocket connector
• Supabase and Convex cloud connectors

API and ABI breaking changes

None. This is a new standalone template with no changes to existing code.

Expected complexity level and risk

1 - This is an additive change that introduces a new isolated template folder. It has no interactions with existing SpacetimeDB crates or modules.

Testing

• Run pnpm install in templates/keynote-2/
• Verify SpacetimeDB module compiles: cd templates/keynote-2/modules/test-1/server && cargo build
• Run a basic benchmark against SpacetimeDB (requires local SpacetimeDB instance)