Rewrite library in Rust using PyO3/maturin#42
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Apr 12, 2026
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- All I/O (BigQuery Storage Read API + Redis) runs on an owned Tokio runtime; the Python GIL is released for every blocking operation.
- Inflight deduplication: concurrent callers waiting on the same query share a single Futures::Shared future so BigQuery is hit only once.
- Background refresh: stale-but-valid cache entries are refreshed asynchronously without blocking the caller.
- Cache format: Redis stores complete Arrow IPC streams (schema + EOS in :schema, full stream with all batches in :data, RFC-3339 timestamp in :query_time). Self-contained streams mean no schema/data concatenation at read time.
- Python interface unchanged: BQRedis(redis_url), query_sync(), query_sync_with_time(), query(), query_with_time(), clear_cache_sync(), clear_cache() all return pyarrow.Table objects.
- Authentication via Application Default Credentials (ADC) only.
- pyproject.toml switched from hatchling to maturin; runtime deps reduced to pyarrow (BigQuery and Redis are now Rust dependencies).
- All I/O (BigQuery Storage Read API + Redis) runs on an owned Tokio runtime; the Python GIL is released for every blocking operation. - Inflight deduplication: concurrent callers waiting on the same query share a single Futures::Shared future so BigQuery is hit only once. - Background refresh: stale-but-valid cache entries are refreshed asynchronously without blocking the caller. - Cache format: Redis stores complete Arrow IPC streams (schema + EOS in :schema, full stream with all batches in :data, RFC-3339 timestamp in :query_time). Self-contained streams mean no schema/data concatenation at read time. - Python interface unchanged: BQRedis(redis_url), query_sync(), query_sync_with_time(), query(), query_with_time(), clear_cache_sync(), clear_cache() all return pyarrow.Table objects. - Authentication via Application Default Credentials (ADC) only. - pyproject.toml switched from hatchling to maturin; runtime deps reduced to pyarrow (BigQuery and Redis are now Rust dependencies). Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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