Bulat_Ziganshin
Silver Member | Редактировать | Профиль | Сообщение | Цитировать | Сообщить модератору SREP 2.99 release candidate: - fixed bug: 32-bit version was unable to decompress large files (>2gb) compressed with -f
btw, i've tested srep on i7-2600k@4.6GHz - compression speed on my files was in 100-200 mb/s range so srep was ALWAYS limited by HDD speed Добавлено: and once again: -nommap testing proves that memory-mapped files slow down the SREP when you are short on RAM: Код: D:\>read lp2.pcf Speed 84.369956 mbytes/sec srep64i -m1 Cpu 148.074 mb/sec, real 83.986 mb/sec srep64i -m2 Cpu 201.726 mb/sec, real 54.300 mb/sec srep64i -m2 -nommap Cpu 209.772 mb/sec, real 71.276 mb/sec srep64i -m3 Cpu 155.684 mb/sec, real 40.795 mb/sec srep64i -m3 -nommap Cpu 157.294 mb/sec, real 57.553 mb/sec Compression ratio: 22,069,494,174 -> 7,284,431,814: 33.01% | ... while having tiny positive effect in situations when RAM is enough to cache all repeated portions of input file: Код: srep64i -m1 Cpu 119.653 mb/sec, real 114.771 mb/sec srep64i -m2 Cpu 129.146 mb/sec, real 123.231 mb/sec srep64i -m2 -nommap Cpu 133.329 mb/sec, real 126.635 mb/sec srep64i -m3 Cpu 108.918 mb/sec, real 105.573 mb/sec srep64i -m3 -nommap Cpu 111.773 mb/sec, real 94.049 mb/sec Compression ratio: 5,586,729,972 -> 4,344,610,562 |
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