fb16dfecae
Commit b7f05445c0 has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.
This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.
Approved by: portmgr (tcberner)
22 lines
1.1 KiB
Text
22 lines
1.1 KiB
Text
CityHash provides hash functions for strings. The functions mix the
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input bits thoroughly but are not suitable for cryptography. See
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"Hash Quality," below, for details on how CityHash was tested and so on.
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Functions by CityHash:
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- CityHash32() returns a 32-bit hash.
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- CityHash64() and similar return a 64-bit hash.
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- CityHash128() and similar return a 128-bit hash and are tuned for
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strings of at least a few hundred bytes. Depending on your compiler
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and hardware, it's likely faster than CityHash64() on sufficiently long
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strings. It's slower than necessary on shorter strings, but we expect
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that case to be relatively unimportant.
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- CityHashCrc128() and similar are variants of CityHash128() that depend
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on _mm_crc32_u64(), an intrinsic that compiles to a CRC32 instruction
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on some CPUs. However, none of the functions we provide are CRCs.
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- CityHashCrc256() is a variant of CityHashCrc128() that also depends
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on _mm_crc32_u64(). It returns a 256-bit hash.
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All members of the CityHash family were designed with heavy reliance
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on previous work by Austin Appleby, Bob Jenkins, and others.
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For example, CityHash32 has many similarities with Murmur3a.
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