ROUTE THE AUTO SELECTOR CHOSE, PER TEST CELL · RTX 4090 · 50,000 ROWS · PLANNING FOR 100 QUERIES One square = one test cell (dataset × threshold). Filled: screening chosen. Number: screening’s measured query speedup over dense. BEFORE THE FIX SCREENING IN 0 OF 18 EXISTING HELD OUT 0.80 0.90 0.95 0.85 0.925 0.975 0.85× 2.24× 2.37× 0.99× 1.30× 1.71× 0.98× 0.98× 0.99× 0.79× 0.78× 2.02× 0.79× 0.79× 1.10× 0.96× 0.93× 0.95× NOT RUN ON THE OLD SOURCE AFTER THE FIX SCREENING IN 18 OF 36 EXISTING HELD OUT 0.80 0.90 0.95 0.85 0.925 0.975 1.62× 2.48× 2.63× 2.21× 2.58× 2.59× 0.94× 1.45× 1.89× 1.20× 1.70× 2.00× 0.98× 0.98× 0.98× 0.96× 0.98× 0.98× 0.81× 2.25× 3.17× 0.79× 2.94× 3.17× 0.79× 0.80× 2.84× 0.80× 2.16× 3.14× 0.92× 0.91× 0.86× 0.92× 0.89× 0.87× ARXIV COCO GLOVE ISOTROPIC CLUSTERED DENSE OUT Bold: screening measured faster, dense chosen anyway. Same source on an RTX A6000: dense in 18 of 18. No retuning before the held-out cells: screening in 10 of 18 there. RINGED CELL, OLD ARITHMETIC 1 TILE TIMED, 27 NOT COUNTED ONE SAMPLE TILE, DENSE 2.86 ms ONE SAMPLE TILE, RANK-64 −1.13 ms SAVED PER QUERY (1 OF 28 TILES) 1.74 ms × 100 QUERIES 174 ms CHARGED: CALIBRATION, ALREADY PAID 422 ms CHARGED: RANK-64 PREPARATION 295 ms CHARGED TO SCREENING 717 ms 174 < 717: DENSE PAYS BACK ONLY AFTER 413 QUERIES RINGED CELL, FIXED ARITHMETIC 4 SHAPES TIMED, EACH × ITS COUNT TILE SHAPE × COUNT DENSE RANK-64 FULL DIAGONAL × 6 2.73 0.99 FULL OFF-DIAGONAL × 15 2.97 1.28 EDGE 8,192×848 × 6 0.43 0.24 EDGE 848×848 × 1 0.10 0.14 FULL QUERY, 28 TILES 63.72 26.76 SAVED PER QUERY 36.96 ms × 100 QUERIES 3,696 ms CHARGED: RANK-64 PREPARATION 70 ms CALIBRATION 294 ms: SUNK, NOT CHARGED 3,696 > 70: RANK-64 MEASURED 64.04 → 25.81 ms, 2.48×