Read the end of the warning on the php's manual of the crc32 function. What are similarities and differences between a checksum algorithm and a hash function? If you do not need the security feature, crc can serve as hash perfectly.
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But you usually don't need that quality of hashing for a hashtable. However, using crc for any kind of security check would be much less secure than a more complex hashing function such as md5. And yes, crc is much easier to.
Your goal performance and small chance of collosion cannot be satified both.
I'm trying to calculate/generate the crc32 hash of some random strings using python but they do not match the values i generate from online sources. A checksum is used to determine if something is the same. Maybe i'm just not seeing it, but crc32 seems either needlessly complicated, or insufficiently explained anywhere i could find on the web. So you could use it for that purpose.
The result is, in my opinion, much. Performance and security considerations aside, and assuming a hash function with a perfect avalanche effect, which should i use for checksumming blocks of data: The hash () algo that corresponds to the crc32 () function is actually 'crc32b' and not 'crc32'. The only reason a hash function gets more computationally expensive is to avoid collosions.
