t# - targetLength
S# - strategy
L# - level
- --zstd= : Single run, parameter selection syntax same as zstdcli.
- When invoked with --optimize, this represents the sample to exceed.
+ --zstd= : Single run, parameter selection syntax same as zstdcli with more parameters
+ (Added forceAttachDictionary / fadt)
+ When invoked with --optimize, this represents the sample to exceed.
--optimize= : find parameters to maximize compression ratio given parameters
- Can use all --zstd= commands to constrain the type of solution found in addition to the following constraints
+ Can use all --zstd= commands to constrain the type of solution found in addition to the following constraints
cSpeed= : Minimum compression speed
dSpeed= : Minimum decompression speed
cMem= : Maximum compression memory
lvl= : Searches for solutions which are strictly better than that compression lvl in ratio and cSpeed,
stc= : When invoked with lvl=, represents percentage slack in ratio/cSpeed allowed for a solution to be considered (Default 100%)
: In normal operation, represents percentage slack in choosing viable starting strategy selection in choosing the default parameters
- (Lower value will begin with stronger strategies) (Default 90%)
+ (Lower value will begin with stronger strategies) (Default 90%)
speedRatio= (accepts decimals)
: determines value of gains in speed vs gains in ratio
- when determining overall winner (default 5 (1% ratio = 5% speed)).
+ when determining overall winner (default 5 (1% ratio = 5% speed)).
tries= : Maximum number of random restarts on a single strategy before switching (Default 5)
- Higher values will make optimizer run longer, more chances to find better solution.
- memLog : Limits the log of the size of each memotable (1 per strategy). Setting memLog = 0 turns off memoization
+ Higher values will make optimizer run longer, more chances to find better solution.
+ memLog : Limits the log of the size of each memotable (1 per strategy). Will use hash tables when state space is larger than max size.
+ Setting memLog = 0 turns off memoization
--display= : specifiy which parameters are included in the output
- can use all --zstd parameter names and 'cParams' as a shorthand for all parameters used in ZSTD_compressionParameters
- (Default: display all params available)
-
- -P# : generated sample compressibility
+ can use all --zstd parameter names and 'cParams' as a shorthand for all parameters used in ZSTD_compressionParameters
+ (Default: display all params available)
+ -P# : generated sample compressibility (when no file is provided)
-t# : Caps runtime of operation in seconds (default : 99999 seconds (about 27 hours ))
-v : Prints Benchmarking output
-D : Next argument dictionary file
-s : Benchmark all files separately
-q : Quiet, repeat for more quiet
+ -q Prints parameters + results whenever a new best is found
+ -qq Only prints parameters whenever a new best is found, prints final parameters + results
+ -qqq Only print final parameters + results
+ -qqqq Only prints final parameter set in the form --zstd=
-v : Verbose, cancels quiet, repeat for more volume
+ -v Prints all candidate parameters and results
```
Any inputs afterwards are treated as files to benchmark.