[{"data":1,"prerenderedAt":216},["ShallowReactive",2],{"run:lego-a9-f16-30k":3,"run-findings:lego-a9-f16-30k":193},{"run":4,"config":18,"metrics":49,"curve":55,"assets":187},{"id":5,"title":5,"subtitle":6,"eyebrow":7,"date":8,"workspace":9,"commit":10,"tags":11,"verdict":17},"lego-a9-f16-30k","A.9 f16 forward (half3 per-pixel accumulator) — wallclock vs PSNR trade-off","Run summary · Phase 5","2026-05-23","splat","cd9491a",[12,13,14,15,16],"a-9","f16-forward","mixed-precision","lego-30k","phase-5","partial",[19,22,25,28,31,34,37,40,43,46],{"key":20,"value":21},"dataset","\u002FUsers\u002Fotkrickey\u002Fdev\u002F3dgs-workspace\u002Fdatasets\u002Fnerf_synthetic\u002Flego",{"key":23,"value":24},"iterations","30,000",{"key":26,"value":27},"seed","42",{"key":29,"value":30},"capacity","1,000,000 splats",{"key":32,"value":33},"sh_degree","3",{"key":35,"value":36},"loss","L1Ssim",{"key":38,"value":39},"lambda","0.200",{"key":41,"value":42},"ssim","window=7 sigma=1",{"key":44,"value":45},"backend.backward","Simd",{"key":47,"value":48},"backend.loss_path","Gpu",{"psnr":50,"wallclock":51,"wallclock_regress":52,"splats":53,"final_loss":54},14.872771263122559,"40m 39s",false,94900,"5.823965e-2",{"loss":56,"splats":181},{"iters":57,"values":119},[58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118],1,500,1000,1500,2000,2500,3000,3500,4000,4500,5000,5500,6000,6500,7000,7500,8000,8500,9000,9500,10000,10500,11000,11500,12000,12500,13000,13500,14000,14500,15000,15500,16000,16500,17000,17500,18000,18500,19000,19500,20000,20500,21000,21500,22000,22500,23000,23500,24000,24500,25000,25500,26000,26500,27000,27500,28000,28500,29000,29500,30000,[120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180],0.34578126668930054,0.11834539473056793,0.12426307797431946,0.1176687628030777,0.095853291451931,0.08713468909263611,0.08255384862422943,0.07945623993873596,0.07639545947313309,0.07505957037210464,0.0727507695555687,0.06998813897371292,0.07029443979263306,0.0693531408905983,0.06793874502182007,0.0671401098370552,0.06787733733654022,0.067052461206913,0.06689460575580597,0.0649728924036026,0.06587612628936768,0.06597050279378891,0.06538920849561691,0.0631372258067131,0.06314853578805923,0.06299029290676117,0.06187140941619873,0.06582285463809967,0.06313250958919525,0.06209156662225723,0.06267452239990234,0.06139799579977989,0.061745136976242065,0.06155705451965332,0.06092274188995361,0.06108412146568298,0.06019279733300209,0.060357414186000824,0.06020484119653702,0.0610627606511116,0.06105160340666771,0.05898873880505562,0.061923764646053314,0.059067465364933014,0.05957876145839691,0.059998519718647,0.06197500228881836,0.05856339633464813,0.06125475466251373,0.059462081640958786,0.05889075994491577,0.06049790605902672,0.05844896286725998,0.05939776822924614,0.05915399640798569,0.05821456015110016,0.05956289917230606,0.05852825939655304,0.05946473404765129,0.059753116220235825,0.0582396537065506,{"iters":182,"values":183},[58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118],[184,185,186,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53,53],5207,6093,23736,{"has_renders":188,"has_splat":52,"render_views":189},true,[190,191,192],"00","01","02",[194],{"id":195,"title":196,"date":8,"status":197,"polarity":198,"category":199,"axes":200,"tags":202,"task_code":207,"related_runs":208,"delta_psnr":210,"delta_wallclock":211,"rank":212,"verdict":213,"impact_summary":214,"detail_path":215},"a-9-f16-forward-negative","A.9 f16 forward — half3 accumulator が underflow + cast overhead で二重 negative","stable","negative","experiment",[201],3,[16,203,14,204,205,206],"f16","metal","underflow","apple-silicon","A.9",[209,5],"lego-sh3-30k","-10.006 dB (14.873 vs 24.879)","+75.1% (2439.73s vs 1393s)","high","rejected","half3 per-pixel accumulator が low-T 領域 (alpha * T \u003C 6e-5) で underflow → 寄与 splat の累積消失で PSNR -10.0 dB。さらに half↔float cast が compute bound でも重く wallclock +75%。Apple Silicon SIMD は half と float が同 throughput、bandwidth bound でないので f16 化は loss-only。","\u002Ffindings\u002Fa-9-f16-forward-negative\u002F",1782449787767]