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libcore: rand: Use a pure Rust implementation of ISAAC RNG #6073

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libcore: rand: Use a pure Rust implementation of ISAAC RNG #6073

wants to merge 2 commits into from

Commits on Apr 29, 2013

  1. core: a pure Rust implementation of the ISAAC RNG. 

    This replaces the wrapper around the runtime RNG with a pure Rust
implementation of the same algorithm. This is faster (up to 5x), and
is hopefully safer.

There is still much room for optimisation: testing by summing 100,000,000
random `u32`s indicates this is about 40-50% slower than the pure C
implementation (running as standalone executable, not in the runtime).
    @huonw
    huonw committed Apr 29, 2013
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  2. core: add some inlining hints to methods/fns in rand.

    @huonw
    huonw committed Apr 29, 2013
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