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Ensure benchmarks use real SpacetimeDB 2.0 (official Rust crate), not SQLite#5

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issue-4-476fa2392aa2
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Ensure benchmarks use real SpacetimeDB 2.0 (official Rust crate), not SQLite#5
konard wants to merge 7 commits intomainfrom
issue-4-476fa2392aa2

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@konard konard commented Feb 25, 2026 •
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Summary

Fixes #4

This PR ensures that benchmarks use the real SpacetimeDB 2.0 engine via the official spacetimedb-core Rust crate, not SQLite or any mock storage layer.

What was implemented

  • Real SpacetimeDB 2.0 engine (rust/src/spacetimedb_impl.rs): Uses spacetimedb-core with TestDB (in-memory RelationalDB, the same engine SpacetimeDB uses internally for its own benchmarks). No SQLite involved.
  • Engine verification at startup: Logs SpacetimeDB version and panics if major version < 2.
  • Links trait (rust/src/lib.rs): Shared interface for SpacetimeDB and Doublets backends.
  • Doublets backends (rust/src/doublets_impl.rs): United Volatile and Split Volatile implementations.
  • Criterion benchmark suite (rust/benches/bench.rs): 21 benchmark functions (7 operations × 3 backends).
  • CI workflow (.github/workflows/rust-benchmark.yml): Tests on Ubuntu/macOS/Windows; generates charts on push to main.
  • Vendored patched libraries: bumpalo-patched (required by SpacetimeDB internals), excluded from file size check.

Acceptance criteria met

  • ✅ Logs show SpacetimeDB 2.0 version at benchmark startup
  • ✅ No SQLite libraries in the storage path (RelationalDB in-memory only)
  • ✅ Benchmarks execute against real SpacetimeDB 2.0 engine
  • ✅ Benchmark fails if backend ≠ SpacetimeDB 2.0+

This PR was created automatically by the AI issue solver

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Initial commit with task details
f112ad9 
Adding CLAUDE.md with task information for AI processing.
This file will be removed when the task is complete.

Issue: #4
@konard konard self-assigned this Feb 25, 2026
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konard commented Feb 26, 2026

Ensure all changes are correct, consistent, validated, tested, logged and fully meet all discussed requirements (check issue description and all comments in issue and in pull request). Ensure all CI/CD checks pass.

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konard commented Feb 26, 2026

🤖 AI Work Session Started

Starting automated work session at 2026-02-26T10:01:47.490Z

The PR has been converted to draft mode while work is in progress.

This comment marks the beginning of an AI work session. Please wait for the session to finish, and provide your feedback.

@konard @claude
Fix formatting and file size CI failures
ccffc13 
- Fix rustfmt errors in rust/src/lib.rs (remove extra blank line)
- Fix rustfmt errors in rust/src/spacetimedb_impl.rs (expand struct
  literal and reformat if-let method chain per nightly rustfmt rules)
- Exclude vendored bumpalo-patched and doublets-patched dirs from
  file size check (they are third-party libraries, not project code)
- Update changelog fragment to accurately describe real SpacetimeDB 2.0
  engine usage (no SQLite, uses RelationalDB/TestDB in-memory)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
@konard konard changed the title [WIP] Ensure benchmarks use real SpacetimeDB 2.0 (official Rust crate), not SQLite Ensure benchmarks use real SpacetimeDB 2.0 (official Rust crate), not SQLite Feb 26, 2026
@konard konard marked this pull request as ready for review February 26, 2026 10:06
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konard commented Feb 26, 2026

Fixed all 4 failing CI checks:

Formatting failures (3) — cargo fmt --all -- --check failed on windows/macos/ubuntu:

  • rust/src/lib.rs: Removed extra blank line after #![feature(allocator_api)]
  • rust/src/spacetimedb_impl.rs: Expanded struct literal Self { db, table_id, next_id: 1 } to multi-line form; reformatted two if let Some(row_ref) = blocks to method chain style per nightly rustfmt rules

File size check failure (1) — scripts/check-file-size.mjs flagged 3 files in rust/bumpalo-patched/src/ (2192, 3005, 2714 lines):

  • Added bumpalo-patched and doublets-patched to the exclusion list — these are vendored third-party libraries required by SpacetimeDB internals, not project source code

Also updated the changelog fragment to accurately describe the real SpacetimeDB 2.0 engine usage (no SQLite).

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konard commented Feb 26, 2026

🤖 Solution Draft Log

This log file contains the complete execution trace of the AI solution draft process.

💰 Cost estimation:

  • Public pricing estimate: $1.893914
  • Calculated by Anthropic: $1.228515 USD
  • Difference: $-0.665400 (-35.13%)
    📎 Log file uploaded as Gist (1599KB)
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Now working session is ended, feel free to review and add any feedback on the solution draft.

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konard commented Feb 26, 2026

🔄 Auto-restart triggered

Reason: CI failures detected

Starting new session to address the issues.

Auto-restart-until-mergeable mode is active. Will continue until PR becomes mergeable.

konard and others added 2 commits February 26, 2026 10:36
@konard @claude
fix: vendor doublets-patched source to fix broken git submodule
b595382 
The rust/doublets-patched directory was registered as a git submodule
(mode 160000) but without a .gitmodules file, making CI unable to check
out the doublets source. This caused all three CI Test jobs to fail with:

  failed to read doublets-patched/doublets/Cargo.toml
  No such file or directory (os error 2)

Root cause: doublets-patched was committed as a git submodule without
the required .gitmodules configuration.

Fix: Remove the broken submodule entry and vendor the doublets source
directly into the repository as regular files. Apply patches to make
doublets compile with modern nightly Rust (>= 1.93.0):

- doublets/src/lib.rs: Remove removed nightly features
  (generators, default_free_fn, bench_black_box, maybe_uninit_uninit_array)
  and add impl_trait_in_assoc_type
- doublets/src/data/traits.rs: Replace default::default() with
  Default::default(), fix ImplIter/ImplIterSmall opaque type aliasing
  that errors with impl_trait_in_assoc_type
- doublets/tests/dyn.rs: Replace removed box syntax with Box::new()
- dev-deps/data-rs: Remove const_trait_impl, const_convert, const_deref,
  const_refs_to_cell, const_result_drop feature flags; convert const trait
  impls and ~const bounds to regular non-const equivalents
- dev-deps/mem-rs: Remove const_nonnull_slice_from_raw_parts,
  default_free_fn, layout_for_ptr, slice_ptr_len, io_error_other,
  const_trait_impl feature flags; fix const Default impl; fix
  LayoutError/AllocError/io::Error conversion in try{} blocks

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
@konard @claude
fix(ci): use Swatinem/rust-cache with cache-on-failure and debug test…
7c93ccd 
… mode

Replace actions/cache@v4 with Swatinem/rust-cache@v2 which saves the
build cache even on job cancellation/timeout (cache-on-failure: "true").
This ensures SpacetimeDB's compiled artifacts are preserved across runs
so subsequent CI runs use the cached build instead of recompiling from scratch.

Also change `cargo test --release` to `cargo test` (debug mode) to avoid
the very slow LTO + codegen-units=1 release profile during testing, which
was causing the initial cold-build to exceed GitHub Actions' 6-hour limit.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Ensure benchmarks use real SpacetimeDB 2.0 (official Rust crate), not SQLite

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