34 lines
1.1 KiB
Markdown
34 lines
1.1 KiB
Markdown
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largeNbDicts
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=====================
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`largeNbDicts` is a benchmark test tool
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dedicated to the specific scenario of
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dictionary decompression using a very large number of dictionaries.
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When dictionaries are constantly changing, they are always "cold",
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suffering from increased latency due to cache misses.
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The tool is created in a bid to investigate performance for this scenario,
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and experiment mitigation techniques.
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Command line :
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```
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largeNbDicts [Options] filename(s)
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Options :
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-z : benchmark compression (default)
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-d : benchmark decompression
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-r : recursively load all files in subdirectories (default: off)
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-B# : split input into blocks of size # (default: no split)
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-# : use compression level # (default: 3)
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-D # : use # as a dictionary (default: create one)
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-i# : nb benchmark rounds (default: 6)
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--nbBlocks=#: use # blocks for bench (default: one per file)
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--nbDicts=# : create # dictionaries for bench (default: one per block)
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-h : help (this text)
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Advanced Options (see zstd.h for documentation) :
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--dedicated-dict-search
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--dict-content-type=#
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--dict-attach-pref=#
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```
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