$ time perl test.pl > out  # 17GB ~ 19GB file size

CORE::rand  . . . . . . . . . . .    12.275s
PDL->random . . . . . . . . . . .  2m04.810s
Math::Prime::Util::drand  . . . .    13.358s
Math::Prime::Util::irand64  . . .    12.462s
Math::Random::random_normal . . .    16.341s
Math::Random::random_uniform  . .    16.328s
Math::Random::MT::Auto::rand  . .    15.040s
$prngMT->rand . . . . . . . . . .    13.339s

$ wc -l out
1000000000