[pull] master from cube-js:master#446
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pull[bot] merged 3 commits intocode:masterfrom May 4, 2026
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Switch the JS-bridge `TransportService::load` path from row-oriented to columnar Cube REST responses, and add a parallel transform path in `cubesql` that consumes `{members, columns}` directly. Per-`DataType` coercion arms are deduplicated between row and columnar via a shared `transform_response_body!` macro (`build_column_iter_loop!` selects between `response.get(i, name)` per cell vs. one column slice fetched up front).
End-to-end median time, `String -> Value -> typed -> Vec<RecordBatch>`,
selected shapes (td = number of time dimensions):
Benchmark is done on my Apple M3 Max:
| rows | cols | td | row (ms) | columnar (ms) | speedup |
|-------:|-----:|---:|---------:|--------------:|--------:|
| 1000 | 8 | 0 | 1.46 | 0.29 | 5.11× |
| 1000 | 64 | 0 | 11.07 | 2.40 | 4.62× |
| 10000 | 8 | 0 | 15.46 | 2.97 | 5.20× |
| 10000 | 64 | 0 | 162.30 | 23.93 | 6.78× |
| 10000 | 64 | 1 | 171.67 | 29.55 | 5.81× |
| 10000 | 64 | 2 | 174.06 | 34.76 | 5.01× |
| 50000 | 64 | 0 | 1041.10 | 166.99 | 6.23× |
| 100000 | 8 | 0 | 199.93 | 45.98 | 4.35× |
| 100000 | 64 | 0 | 2062.20 | 350.98 | 5.88× |
| 100000 | 64 | 2 | 2200.40 | 423.01 | 5.20× |
You can reproduce it by `cargo bench -p cubesql --bench transform_response`.
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