[Cdash] ITK appears in GDCM cdash

Brad King brad.king at kitware.com
Thu Sep 3 12:23:51 UTC 2009

Julien Jomier wrote:
> Amitha Perera wrote:
>> Do you need a small integer?  You should really use a well known
>> hashing algorithm, like SHA. I think even the 160-bit SHA-1 should be
>> good enough for CDash.
> The main issue is speed. For every test submitted we check if the
> computed crc32 is already in the database, if not we insert the new
> test. Comparing string is usually very slow for SQL queries, that's why
> crc32 was a good fit. Can SHA-1 (or other algorithms) return an integer?

All these hash algorithms return integers...just ones that have many bits.
It is only a convention that they are written with characters for human

How big can SQL's integers be?  Can you store four 64-bit integers?


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