4 `largeNbDicts` is a benchmark test tool
5 dedicated to the specific scenario of
6 dictionary decompression using a very large number of dictionaries.
7 When dictionaries are constantly changing, they are always "cold",
8 suffering from increased latency due to cache misses.
10 The tool is created in a bid to investigate performance for this scenario,
11 and experiment mitigation techniques.
15 largeNbDicts [Options] filename(s)
18 -z : benchmark compression (default)
19 -d : benchmark decompression
20 -r : recursively load all files in subdirectories (default: off)
21 -B# : split input into blocks of size # (default: no split)
22 -# : use compression level # (default: 3)
23 -D # : use # as a dictionary (default: create one)
24 -i# : nb benchmark rounds (default: 6)
25 --nbBlocks=#: use # blocks for bench (default: one per file)
26 --nbDicts=# : create # dictionaries for bench (default: one per block)
29 Advanced Options (see zstd.h for documentation) :
30 --dedicated-dict-search