datatable.options.nthreads¶
nthreads
nthreads
This option controls the number of threads used by datatable for parallel calculations.
Parameters¶
return
int
Current nthreads
value. Initially, this option is set to
the value returned by C++ call std::thread::hardware_concurrency()
,
and usually equals to the number of available cores.
new_nthreads
int
New nthreads
value. It can be greater or smaller than the initial setting.
For example, setting nthreads = 1
will force the library into
a single-threaded mode. Setting nthreads
to 0
will restore
the initial value equal to the number of processor cores.
Setting nthreads
to a value less than 0
is equivalent to requesting
that fewer threads than the maximum.
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