SHA-1 prototype » History » Version 7
Greg Burri, 11/19/2009 08:04 AM
| 1 | 1 | Greg Burri | h1. SHA-1 prototype |
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| 2 | |||
| 3 | directory : source:/prototypes/01_SHA1 |
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| 4 | |||
| 5 | h2. Goals |
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| 6 | |||
| 7 | * Compute the SHA-1 of each part of a given file. |
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| 8 | * Compute the SHA-1 of a stream. |
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| 9 | * Find the fastest way to compute SHA1, should be at least 40 MB/s. |
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| 10 | |||
| 11 | 5 | Greg Burri | h2. Speed measures against _sha1sum_ |
| 12 | 1 | Greg Burri | |
| 13 | file : @01.wmv@ : 17'639'245 byte ~ 17Mo (buffered) |
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| 14 | Each measurement is pre-runned once to put the file in cache. |
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| 15 | |||
| 16 | |||
| 17 | h3. _sha1sum_ from _GNU coreutils_ (Reference) |
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| 18 | |||
| 19 | speed : 57 MB/s |
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| 20 | |||
| 21 | <pre> |
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| 22 | <gburri@overnux:~/code/lang/haskell/SHA1$> time sha1sum < 01.wmv |
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| 23 | 3aec84601612e8c604ac01971e0ecd9d536dbead - |
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| 24 | |||
| 25 | real 0m0.301s |
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| 26 | user 0m0.276s |
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| 27 | sys 0m0.020s |
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| 28 | </pre> |
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| 29 | |||
| 30 | 5 | Greg Burri | h3. QCryptographicHash (release -O2) |
| 31 | 1 | Greg Burri | |
| 32 | 4 | Greg Burri | speed : 49 MB/s |
| 33 | 1 | Greg Burri | |
| 34 | <pre> |
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| 35 | 4 | Greg Burri | <flynux:~/code/projects/aybabtu/prototypes/01_SHA1 $> time ./qt_sha1 all 01.wmv |
| 36 | 3aec84601612e8c604ac01971e0ecd9d536dbead |
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| 37 | 2 | Greg Burri | |
| 38 | 4 | Greg Burri | real 0m0.340s |
| 39 | 2 | Greg Burri | user 0m0.324s |
| 40 | 1 | Greg Burri | sys 0m0.016s |
| 41 | </pre> |
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| 42 | 5 | Greg Burri | |
| 43 | |||
| 44 | h2. Speed measures against _Linus's sha1_ |
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| 45 | |||
| 46 | file : @test.bin@ : 754'856'284 byte ~ 720Mo (buffered) |
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| 47 | Each measurement is pre-runned once to put the file in cache. |
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| 48 | |||
| 49 | |||
| 50 | h3. _Linus's sha1_ |
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| 51 | |||
| 52 | 7 | Greg Burri | h4. Debug mode |
| 53 | 5 | Greg Burri | |
| 54 | Speed : 69.3 MB/s |
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| 55 | |||
| 56 | <pre> |
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| 57 | $ time ./debug/01_SHA1.exe all ~/data.bin |
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| 58 | ca6fa5e8eeb976193f81a01bf67e4bbf3f07357f |
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| 59 | |||
| 60 | real 0m10.383s |
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| 61 | user 0m0.015s |
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| 62 | sys 0m0.000s |
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| 63 | </pre> |
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| 64 | |||
| 65 | 7 | Greg Burri | h4. Release mode (-02) |
| 66 | 5 | Greg Burri | |
| 67 | 6 | Greg Burri | Speed : 165.1 MB/s |
| 68 | 5 | Greg Burri | |
| 69 | <pre> |
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| 70 | $ time ./release/01_SHA1.exe all ~/data.bin |
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| 71 | ca6fa5e8eeb976193f81a01bf67e4bbf3f07357f |
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| 72 | |||
| 73 | real 0m4.360s |
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| 74 | user 0m0.000s |
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| 75 | sys 0m0.015s |
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| 76 | </pre> |
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| 77 | |||
| 78 | h3. QCryptographicHash |
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| 79 | |||
| 80 | 7 | Greg Burri | h4. Debug mode |
| 81 | 5 | Greg Burri | |
| 82 | Speed :21 MB/s |
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| 83 | |||
| 84 | <pre> |
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| 85 | $ time ./debug/01_SHA1.exe all ~/data.bin |
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| 86 | ca6fa5e8eeb976193f81a01bf67e4bbf3f07357f |
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| 87 | |||
| 88 | real 0m34.223s |
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| 89 | user 0m0.015s |
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| 90 | sys 0m0.000s |
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| 91 | </pre> |
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| 92 | |||
| 93 | 7 | Greg Burri | h4. Release mode (-02) |
| 94 | 5 | Greg Burri | |
| 95 | Speed : 164.4 MB/s |
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| 96 | |||
| 97 | <pre> |
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| 98 | $ time ./release/01_SHA1.exe all ~/data.bin.mkv |
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| 99 | ca6fa5e8eeb976193f81a01bf67e4bbf3f07357f |
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| 100 | |||
| 101 | real 0m4.380s |
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| 102 | user 0m0.000s |
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| 103 | sys 0m0.015s |
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| 104 | </pre> |
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| 105 | 1 | Greg Burri | |
| 106 | 6 | Greg Burri | h2. Conclusions |
| 107 | |||
| 108 | * The Qt implementation is fast and can be used without problem. |
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| 109 | * The Qt implementation in debug mode is *very* slow, be careful. |