Lance benchmark run: https://github.com/lancedb/lance-bench/actions/runs/31006283603\nLance SHA: d4da624\nSuite: Python ci_benchmarks\n\nConfirmed affected benchmarks:\n- test_basic_btree_search[cache-None-none]: 12.8 ms at 20c7378 -> 375.8 ms at d4da624; regression report +630.72%, p<0.000001.\n- test_basic_btree_search[cache-small_strings-none]: 48.3 ms -> 114.1 ms; +41.69%, p=0.000005.\n- test_basic_bitmap_search[cache-None-none]: the last-four window is +28.58%, p=0.000111.\n\nThe sharp BTree change appeared between 20c7378 (2026-07-31) and d4da624 (2026-08-05). b0b631e ("support register and switch pluggable cache backend") landed immediately after the prior measured commit and is a plausible starting point, though the full range should be bisected.\n\nPlease reproduce with python/ci_benchmarks/benchmarks/test_search.py using the cache variants above.
Lance benchmark run: https://github.com/lancedb/lance-bench/actions/runs/31006283603\nLance SHA: d4da624\nSuite: Python ci_benchmarks\n\nConfirmed affected benchmarks:\n- test_basic_btree_search[cache-None-none]: 12.8 ms at 20c7378 -> 375.8 ms at d4da624; regression report +630.72%, p<0.000001.\n- test_basic_btree_search[cache-small_strings-none]: 48.3 ms -> 114.1 ms; +41.69%, p=0.000005.\n- test_basic_bitmap_search[cache-None-none]: the last-four window is +28.58%, p=0.000111.\n\nThe sharp BTree change appeared between 20c7378 (2026-07-31) and d4da624 (2026-08-05). b0b631e ("support register and switch pluggable cache backend") landed immediately after the prior measured commit and is a plausible starting point, though the full range should be bisected.\n\nPlease reproduce with python/ci_benchmarks/benchmarks/test_search.py using the cache variants above.