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hyperfine:tldr:325fc
This command uses a tool called hyperfine
to measure the execution time of a given command. Here is a breakdown of the command and its components:
-
--prepare '${make clean}'
: This option specifies a preparation command to be executed before each timing measurement. In this case,make clean
is passed as an argument, which typically cleans the build artifacts created by themake
command. -
--parameter-scan
: This option indicates that we want to perform a parameter scan, where multiple executions of the command will be timed by varying a specific parameter. -
${num_threads} ${1} ${10}
: These are the parameter values that will be scanned. They are represented as shell variables, withnum_threads
being the first parameter, followed by1
, and finally10
. These values will be substituted into the command being timed. -
'${make -j {num_threads}}'
: This is the command to be timed. It starts withmake -j
, which typically runs themake
command in parallel, utilizing a certain number of threads specified with the-j
option. The{num_threads}
placeholder will be replaced by the parameter value during each timing measurement.
In summary, this command uses hyperfine
to measure the execution time of a make
command with different values of the num_threads
parameter. Before each measurement, it performs a make clean
to ensure a clean build environment. The actual make
command is executed in parallel with the specified number of threads.