CODEWITHSUNDEEP
php
user1493356
user1493356

Reputation:

Absolute fastest method of hashing a string in PHP

What is the absolute fastest way to hash a string in PHP?

I have read that md5 can be relatively slow but am unsure of the alternatives.

Basically, i have a function that i need to squeeze every last bit of performance possible out of and within that function i have a string say "yada yada yada" and i need it hashed in someway so it becomes one string.

I should note that security is no issue here - i simply need a single unique string representation, as its for a cache key.

Upvotes: 1

Views: 665

Answers (2)

Martin
Martin

Reputation: 6687

The whole point of a hash is that it's -not- fast. The faster the hash is the faster it can be cracked.

By that logic, the less secure the hash is - the faster it'll be. If you're going to favour such logic I suggest you either stop what you're doing or use encryption instead.

In response to your update

It sounds like you may want a CRC. Again it's worth mentioning that typically the faster the check is the less combinations exist for the particular algorithm, and thus it's less likely to be a "unique representation".

The associated PHP documentation can be found here: hash function with crc32/crc32b

Upvotes: 3

Esben Tind
Esben Tind

Reputation: 885

Benchmarks. I seem to recall reading somewhere that this depends a lot of your version of apache and PHP, can't remember where though. I'll post if I remember :)

Upvotes: 3

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