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Pour mesurer les temps de compression, j’ai utilisé la commande Unix time

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|                 | alice           |   ls           |
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| non comprimé    | 166355  /  0 ms | 133792 /  0 ms |
| compress        |  65635  /  6 ms |  83471 /  5 ms |
| gzip            |  56338  / 15 ms |  61105 / 12 ms |
| bzip2           |  44185  / 25 ms |  61047 / 20 ms |
| xz              |  49316  / 77 ms |  52976 / 51 ms |
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