Hi, nginxers! We often use hashtable sizes equal to the power of 2. This can be damaging for a hashtable. I haven't found any mitigation for this in nginx code. So I made my own. If this issue is addressed somewhere just ignore my message. Or I'd be happy if someone will point me it.
For the explanation of problem see https://stackoverflow.com/questions/3980117/hash-table-why-size-should-be-prime Code is checked for correctness of ngx_hash_min_prime(), I haven't done any regression testing, sorry. Also beware that I've changed state of paremeter hinit. I'm not sure this is acceptable. Thank you for your attention. Best regards, Andrey Borodin, Octonica.
primes_for_hash.patch
Description: Binary data
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