Functions > DJBHash

SIGNATURE=IW.Common.HashUtils.DJBHash@Pointer@Integer

ETYPE=Function

Declaration:

Delphi:	function DJBHash(AData: Pointer; ADataLength: Integer): Cardinal;
C++:	unsigned DJBHash(void * AData, int ADataLength);

Unit: IW.Common.HashUtils.pas

Description: FNV1aMeiyan is the fastest general purpose hash function that I'm aware of, with excellent distribution and low collision rate. It is faster than xxHash and others which claim to be "the fastest" Time (ms) hashing integers from 0 to MAXINT. Please note that the advantage gets bigger when data size increases (including strings) 32-bit Release: DJBHash: 6719 FNV1aHash: 5214 Murmur2Hash: 5775 FNV1aMeiyanHash (Pointer): 4572 FNV1aMeiyanHash (PInteger): 3806

Parameters:

•AData: Pointer

•ADataLength: Integer

Result(Cardinal):