Print or check xxHash (32, 64 or 128 bits) checksums\. When no \fIFILE\fR, read standard input, except if it\'s the console\. When \fIFILE\fR is \fB\-\fR, read standard input even if it\'s the console\.
\fBxxhsum\fR supports a command line syntax similar but not identical to md5sum(1)\. Differences are: \fBxxhsum\fR doesn\'t have text/binary mode switch (\fB\-b\fR, \fB\-t\fR); \fBxxhsum\fR always treats files as binary file; \fBxxhsum\fR has a hash bit width switch (\fB\-H\fR);
Hash selection\.\fIHASHTYPE\fR means \fB0\fR=32bits, \fB1\fR=64bits, \fB2\fR=128bits\. Alternatively, \fIHASHTYPE\fR\fB32\fR=32bits, \fB64\fR=64bits, \fB128\fR=128bits\. Default value is \fB1\fR (64bits)
Return an error code if any line in the file is invalid, not just if some checksums are wrong\. This policy is disabled by default, though UI will prompt an informational message if any line in the file is detected invalid\.
Only useful for benchmark mode (\fB\-b\fR)\. See \fIEXAMPLES\fR for details\.\fIBLOCKSIZE\fR specifies benchmark mode\'s test data block size in bytes\. Default value is 102400
Only useful for benchmark mode (\fB\-b\fR)\. See \fIEXAMPLES\fR for details\.\fIITERATIONS\fR specifies number of iterations in benchmark\. Single iteration lasts approximately 1000 milliseconds\. Default value is 3
Benchmark xxHash algorithm\. By default, \fBxxhsum\fR benchmarks xxHash main variants on a synthetic sample of 100 KB, and print results into standard output\. The first column is the algorithm, the second column is the source data size in bytes, the third column is the number of hashes generated per second (throughput), and finally the last column translates speed in megabytes per second\.
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.IP""4
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.nf
$ xxhsum \-b
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.fi
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.IP""0
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.P
In the following example, the sample to hash is set to 16384 bytes, the variants to be benched are selected by their IDs, and each benchmark test is repeated 10 times, for increased accuracy\.
