How to use the blosc.blosc_extension.set_nthreads function in blosc

to a value slightly below than your number of cores.

    Examples
    --------
    Set the number of threads to 2 and then to 1:

    >>> oldn = blosc.set_nthreads(2)
    >>> blosc.set_nthreads(1)
    2

    """
    if nthreads > blosc.MAX_THREADS:
        raise ValueError("the number of threads cannot be larger than %d" %
                         blosc.MAX_THREADS)

    return _ext.set_nthreads(nthreads)

to a value slightly below than your number of cores.

    Examples
    --------
    Set the number of threads to 2 and then to 1:

    >>> oldn = set_nthreads(2)
    >>> set_nthreads(1)
    2

    """
    if nthreads > _ext.BLOSC_MAX_THREADS:
        raise ValueError("the number of threads cannot be larger than %d" % \
                         _ext.BLOSC_MAX_THREADS)

    return _ext.set_nthreads(nthreads)