LightGBM attempts to speed up many operations by using multi-threading.
The number of threads used in those operations can be controlled via the
num_threads parameter passed through params to functions like
lgb.train and lgb.Dataset. However, some operations (like materializing
a model from a text file) are done via code paths that don't explicitly accept thread-control
configuration.
Use this function to see the default number of threads LightGBM will use for such operations.
getLGBMthreads()number of threads as an integer. -1 means that in situations where parameter num_threads is
not explicitly supplied, LightGBM will choose a number of threads to use automatically.