SHA-1 prototype¶

directory : source:/prototypes/01_SHA1

Goals¶

• Compute the SHA-1 of each part of a given file.
• Compute the SHA-1 of a stream.
• Find the fastest way to compute SHA1, should be at least 40 MB/s.

Speed measures¶

file : 01.wmv : 17'639'245 byte ~ 17Mo (buffered)
Each measurement is pre-runned once to put the file in cache.

sha1sum from GNU coreutils (Reference)¶

speed : 57 MB/s

<gburri@overnux:~/code/lang/haskell/SHA1$> time sha1sum < 01.wmv
3aec84601612e8c604ac01971e0ecd9d536dbead  -

real    0m0.301s
user    0m0.276s
sys     0m0.020s

QCryptographicHash¶

speed : 47 MB/s

<flynux:~/code/projects/aybabtu/prototypes/01_SHA1/qt_sha1 $> time ./qt_sha1 ../01.wmv
"3aec84601612e8c604ac01971e0ecd9d536dbead" 

real    0m0.353s
user    0m0.324s
sys     0m0.028s