This set of measurements was captured by Daniel Fischer on one of his older machines, running SuSE 8.2, which has a Linux 2.4 kernel! The benchmarks were run on 2007-12-16 using ghc 6.9.20071124. Unfortunately, the ghc version is not quite the same as the one I've used for most measurements (6.9.20071119) so things may be a little different just for that reason. The results seemed a bit off at first, but now that I have graphs of all the runs on all the machines they don't seem strange at all. First of all, the memory use is about the same as on the other machines. Secondly, the timing differences for the C getchar/getwchar might be partly due to different versions of the C library. The remaining differences (a "steeper" profile than on the core duo and the Athlon64) may be due to different microarchitectures. -Peter Fischer's machine ghc 6.9.20071124 AMD Duron(tm) processor 1200.089 MHz TESTKIND=THOROUGH SUFFIX= Time (byte counting) std -------------------- avg dev slack hs/byte-bs----acc: 1.892 21‰ 0.4 ██▊ | hs/byte-bs----foldlx: 2.258 3‰ 0.1 ███▎ | hs/byte-bs----foldrx: 2.933 0‰ 0.1 ████▎ | hs/byte-bsl---acc: 14.319 45‰ 0.1 ████████████████████▌ | hs/byte-xxxxx-acc-1: 20.915 17‰ 4.0 █████████████████████████████▉ | hs/byte-xxxxx-acc-2: 20.691 8‰ 0.1 █████████████████████████████▌ | hs/byte-xxxxx-foldl: 20.610 5‰ 1.4 █████████████████████████████▍ | c/byte-getchar: 9.042 0‰ 0.1 ████████████▉ | c/byte-getchar-u: 1.314 3‰ 0.2 █▉ | c/byte-4k: 0.419 5‰ 0.5 ▋ | Memory: Peak ------- KB hs/byte-bs----acc: 147492 ████████████████████████████████████████ | hs/byte-bs----foldlx: 147492 ████████████████████████████████████████ | hs/byte-bs----foldrx: 147488 ████████████████████████████████████████ | hs/byte-bsl---acc: 2896 ▊ | hs/byte-xxxxx-acc-1: 1612 ▌ | hs/byte-xxxxx-acc-2: 1612 ▌ | hs/byte-xxxxx-foldl: 1612 ▌ | c/byte-getchar: 384 ▏ | c/byte-getchar-u: 384 ▏ | c/byte-4k: 380 ▏ | Time (space counting) std --------------------- avg dev slack hs/space-bs-c8-acc-1: 2.467 1‰ 0.3 ███▌ | hs/space-bs-c8-foldlx-1: 2.585 2‰ 0.1 ███▊ | hs/space-bs-c8-foldlx-2: 2.576 2‰ 0.3 ███▋ | hs/space-bs-c8-foldrx: 2.982 8‰ 2.3 ████▎ | hs/space-bs-c8-lenfil: 2.599 1‰ 0.2 ███▊ | hs/space-bslc8-acc-1: 15.228 8‰ 0.1 █████████████████████▊ | hs/space-bslc8-acc-2: 15.855 38‰ 0.0 ██████████████████████▋ | hs/space-bslc8-acc-3: 14.980 14‰ 0.0 █████████████████████▍ | hs/space-bslc8-chunk-1: 2.443 2‰ 0.2 ███▌ | hs/space-bslc8-chunk-2: 2.449 1‰ 0.3 ███▌ | hs/space-bslc8-chunk-3: 2.534 3‰ 0.3 ███▋ | hs/space-bslc8-foldl: 2.938 1‰ 0.2 ████▎ | hs/space-bslc8-foldlx-1: 2.928 1‰ 0.0 ████▏ | hs/space-bslc8-foldlx-2: 2.937 2‰ 0.2 ████▎ | hs/space-bslc8-foldr-1: 4.043 6‰ 0.1 █████▊ | hs/space-bslc8-foldr-2: 4.007 4‰ 0.1 █████▊ | hs/space-bslc8-lenfil-1: 3.240 1‰ 0.2 ████▋ | hs/space-bslc8-lenfil-2: 3.236 1‰ 0.2 ████▋ | hs/space-bsl---foldlx: 2.821 1‰ 0.1 ████ | hs/space-xxxxx-acc-1: 21.002 4‰ 0.1 ██████████████████████████████ | hs/space-xxxxx-acc-2: 21.270 22‰ 4.7 ██████████████████████████████▍ | hs/space-xxxxx-foldl: 20.934 1‰ 0.1 █████████████████████████████▉ | hs/space-xxxxx-lenfil: 25.915 3‰ 0.0 █████████████████████████████████████| c/space-getchar: 9.354 0‰ 0.0 █████████████▍ | c/space-getchar-u: 1.676 2‰ 0.2 ██▍ | c/space-4k: 1.293 2‰ 0.5 █▉ | c/space-megabuf: 1.830 3‰ 0.5 ██▋ | c/space-getwchar: 14.721 1‰ 0.1 █████████████████████ | c/space-getwchar-u: 4.814 0‰ 0.0 ██████▉ | c/space-32k: 1.276 2‰ 0.6 █▉ | c/space-32k-8: 1.275 2‰ 0.2 █▉ | Memory: Peak ------- KB hs/space-bs-c8-acc-1: 147488 ████████████████████████████████████████ | hs/space-bs-c8-foldlx-1: 147492 ████████████████████████████████████████ | hs/space-bs-c8-foldlx-2: 147492 ████████████████████████████████████████ | hs/space-bs-c8-foldrx: 147488 ████████████████████████████████████████ | hs/space-bs-c8-lenfil: 147492 ████████████████████████████████████████ | hs/space-bslc8-acc-1: 2896 ▊ | hs/space-bslc8-acc-2: 2896 ▊ | hs/space-bslc8-acc-3: 2896 ▊ | hs/space-bslc8-chunk-1: 65892 █████████████████▉ | hs/space-bslc8-chunk-2: 65892 █████████████████▉ | hs/space-bslc8-chunk-3: 76472 ████████████████████▊ | hs/space-bslc8-foldl: 86772 ███████████████████████▋ | hs/space-bslc8-foldlx-1: 86772 ███████████████████████▋ | hs/space-bslc8-foldlx-2: 86772 ███████████████████████▋ | hs/space-bslc8-foldr-1: 169360 ██████████████████████████████████████████████| hs/space-bslc8-foldr-2: 169360 ██████████████████████████████████████████████| hs/space-bslc8-lenfil-1: 110704 ██████████████████████████████▏ | hs/space-bslc8-lenfil-2: 110704 ██████████████████████████████▏ | hs/space-bsl---foldlx: 86776 ███████████████████████▋ | hs/space-xxxxx-acc-1: 1612 ▌ | hs/space-xxxxx-acc-2: 1612 ▌ | hs/space-xxxxx-foldl: 1612 ▌ | hs/space-xxxxx-lenfil: 1588 ▍ | c/space-getchar: 384 ▏ | c/space-getchar-u: 384 ▏ | c/space-4k: 412 ▏ | c/space-megabuf: 146904 ███████████████████████████████████████▉ | c/space-getwchar: 440 ▏ | c/space-getwchar-u: 440 ▏ | c/space-32k: 436 ▏ | c/space-32k-8: 436 ▏ |