93a789f651
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>
20 lines
1.7 KiB
Text
20 lines
1.7 KiB
Text
[2026-10-07T18:51:14Z] rows: prog=drawn:2 id=0xd3fead516b1ab00c attempt=0 sites=16 plant=none live=false hashes=2000000 shard=0/1
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[2026-10-07T18:52:48Z] done 62500 units (2000000 lane-hashes) in 94.3s
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sites win (0 = whole dataset, 1 = half, 2 = quarter): [1, 0, 2, 2, 2, 0, 1, 0, 1, 1, 1, 1, 2, 2, 1, 1]
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== PER HASH (128 loads) prog=drawn:2 plant=none live=false n=2000000
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metric mean min q1e-3 q1e-4 q1e-5 | windowed baseline mean min q1e-3 q1e-4 q1e-5 | uniform mean min
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rows2KiB 127.983 126 127 126 126 | 127.983 125 127 126 126 | 127.985 125
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rows8KiB 127.930 124 126 126 125 | 127.930 124 126 126 125 | 127.938 125
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lines64B 127.999 127 128 127 127 | 127.999 127 128 127 127 | 128.000 127
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items64B 127.999 127 128 127 127 | 127.999 127 128 127 127 | 128.000 127
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== PER UNIT (4096 loads) prog=drawn:2 plant=none live=false n=62500
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metric mean min q1e-3 q1e-4 q1e-5 | windowed baseline mean min q1e-3 q1e-4 q1e-5 | uniform mean min
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rows2KiB 4077.901 4051 4063 4061 4051 | 4077.882 4049 4064 4061 4049 | 4080.044 4060
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rows8KiB 4024.255 3989 3997 3991 3989 | 4024.238 3985 3997 3991 3985 | 4032.651 3997
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lines64B 4095.428 4090 4092 4091 4090 | 4095.434 4090 4092 4091 4090 | 4095.495 4090
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items64B 4095.428 4090 4092 4091 4090 | 4095.434 4090 4092 4091 4090 | 4095.495 4090
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== SAME-INSTRUCTION COALESCING per unit (lane pairs of one load site sharing a row or line; 128 sites x 496 pairs)
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metric mean max (expected uniform: 2KiB 0.1211, 8KiB 0.4844, 64B 0.00378 per unit)
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pairs row2KiB 0.2938 5
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pairs row8KiB 1.1842 8
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pairs line64B 0.0094 2
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