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Header grinding for locality on the frozen objectc3d32437(igneum-pow identical at base5e412177). BOUND: ten accepted class v4 programs over 2.6e7 header-chosen hashes sit on the windowed random baseline at mean, min and the 1e-3/1e-4/1e-5 tails for 2 KiB rows, 8 KiB rows, 64 B lines and items, per hash and per unit, closed form and live dataset alike; one-bit header flips move 100 percent of the 4,096 unit addresses; 2 to 4 of 16 load sites are header-predictable, none after iteration 0. Price: the best 1-in-15 header groups run 0.09 percent faster on an RTX A6000 (measured) and cost 15 hashes each; no grind nets 1 percent. One small FINDING: drawn program 0x5d7cc2b09fc6922a repeats a word across two load sites in 1.55 percent of hashes (a register-amount rotate as the only write between two loads from one register), 0.1 percent of loads, header-independent. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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[2026-10-07T19:22:32Z] export: wrote 2048 units (33554432 bytes) to tables/devnet-const2048.bin, prog=devnet plant=const-site best=false, mean distinct 8 KiB rows 3776.81
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