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dSFMT: use fill_array_* API instead of genrand_* API #8832

Merged
merged 2 commits into from
Oct 30, 2014
Merged

dSFMT: use fill_array_* API instead of genrand_* API #8832

merged 2 commits into from
Oct 30, 2014

Commits on Oct 29, 2014

  1. dSFMT: use fill_array_* API instead of genrand_* API 

    Both APIs are not very compatible, so let's use fill_array_* functions, which
are faster but require MersenneTwister to have an additional array field.
    @rfourquet
    rfourquet committed Oct 29, 2014
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  2. make Julia global RNG be an instance of MersenneTwister 

    The state of the global RNG was previously handled by libdSFMT.
This commit allows the global RNG to benefit speed improvements resulting
from the use of fill_array_* functions (cf. previous commit).

However, scalar calls to rand() (i.e. producing one value instead of
filling an array) using the global RNG are now slower, as well as those
filling non-Float64 arrays (less than twice as slow though).
    @rfourquet
    rfourquet committed Oct 29, 2014
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