Post a Comment On: cbloom rants

Filling in a gap in the previous post : cbloom rants 05-09-15 - Oodle LZNA The encode speeds on lzt99 : single-threaded : ============== LZNA : -z5 (Optimal1) : 24,700,820 -> 9,207,584 = 2.982 bpb = 2.683 to 1 encode : 10.809 seconds, 1.32 b/kc, rate= 2.29 mb/s decode : 0.318 seconds, 44.87 b/kc, rate= 77.58 mb/s -z6 (Optimal2) : 24,700,820 -> 9,154,343 = 2.965 bpb = 2.698 to 1 encode : 14.727 seconds, 0.97 b/kc, rate= 1.68 mb/s decode : 0.313 seconds, 45.68 b/kc, rate= 78.99 mb/s -z7 (Optimal3) : 24,700,820 -> 9,069,473 = 2.937 bpb = 2.724 to 1 encode : 20.473 seconds, 0.70 b/kc, rate= 1.21 mb/s decode : 0.317 seconds, 45.06 b/kc, rate= 77.92 mb/s ========= LZMA : lzmahigh : 24,700,820 -> 9,329,982 = 3.022 bpb = 2.647 to 1 encode : 11.373 seconds, 1.26 b/kc, rate= 2.17 M/s decode : 0.767 seconds, 18.62 b/kc, rate= 32.19 M/s ========= LZHAM BETTER : lzham : 24,700,820 ->10,140,761 = 3.284 bpb = 2.436 to 1 encode : 16.732 seconds, 0.85 b/kc, rate= 1.48 M/s decode : 0.242 seconds, 59.09 b/kc, rate= 102.17 M/s LZHAM UBER : lzham : 24,700,820 ->10,097,341 = 3.270 bpb = 2.446 to 1 encode : 18.877 seconds, 0.76 b/kc, rate= 1.31 M/s decode : 0.239 seconds, 59.73 b/kc, rate= 103.27 M/s LZHAM UBER + EXTREME : lzham : 24,700,820 -> 9,938,002 = 3.219 bpb = 2.485 to 1 encode : 185.204 seconds, 0.08 b/kc, rate= 133.37 k/s decode : 0.245 seconds, 58.28 b/kc, rate= 100.77 M/s =============== LZNA -z5 threaded : 24,700,820 -> 9,211,090 = 2.983 bpb = 2.682 to 1 encode only : 8.523 seconds, 1.68 b/kc, rate= 2.90 mb/s decode only : 0.325 seconds, 43.96 b/kc, rate= 76.01 mb/s LZMA threaded : lzmahigh : 24,700,820 -> 9,329,925 = 3.022 bpb = 2.647 to 1 encode : 7.991 seconds, 1.79 b/kc, rate= 3.09 M/s decode : 0.775 seconds, 18.42 b/kc, rate= 31.85 M/s LZHAM BETTER threaded : lzham : 24,700,820 ->10,198,307 = 3.303 bpb = 2.422 to 1 encode : 7.678 seconds, 1.86 b/kc, rate= 3.22 M/s decode : 0.242 seconds, 58.96 b/kc, rate= 101.94 M/s I incorrectly said in the original version of the LZNA post (now corrected) that "LZHAM UBER is too slow". It's actually the "EXTREME" option that's too slow. Also, as I noted last time, LZHAM is the best threaded of the three, so even though BETTER is slower than LZNA -z5 or LZMA in single-threaded encode speed, it's faster threaded. (Oodle's encoder threading is very simplistic (chunking) and really needs a larger file to get full parallelism; it doesn't use all cores here; LZHAM is much more micro-threaded so can get good parallelism even on small files).