[pull] master from cube-js:master#452
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The compact transform was the only output path still doing dictionary lookups per cell, per row: for every member it re-walked annotation -> members_to_alias_map -> columns_pos before reading the cell. The other two paths (vanilla, columnar) already precompute a plan. Bench on my Apple M3 Max `TransformedData::transform/compact`, median wall time before → after (ms): | cols / rows | 1 000 | 10 000 | 50 000 | 100 000 | | ----------- | -------------- | -------------- | --------------- | ---------------- | | 8 | 0.505 → 0.135 | 5.11 → 1.35 | 25.6 → 6.89 | 51.4 → 13.9 | | 16 | 1.07 → 0.275 | 10.5 → 2.72 | 52.5 → 13.9 | 104.5 → 28.3 | | 32 | 2.07 → 0.528 | 20.6 → 5.36 | 101.4 → 27.7 | 203.0 → 55.2 | | 64 | 4.14 → 1.02 | 39.9 → 10.3 | 199.1 → 51.7 | 401.4 → 101.7 | | cols / rows | 1 000 | 10 000 | 50 000 | 100 000 | | ----------- | ------- | ------- | ------- | ------- | | 8 | -73.4% | -73.6% | -72.9% | -72.9% | | 16 | -74.3% | -74.0% | -73.4% | -72.9% | | 32 | -74.5% | -73.9% | -73.2% | -72.3% | | 64 | -75.1% | -74.1% | -73.3% | -74.6% | Roughly 3.7-4.0x faster across the matrix. Same magnitude as the analogous hoist on the columnar branch.
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