shootout-mandelbrot: Either 10-20% or 80-100% improvement.#14203

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Ryman wants to merge 2 commits intorust-lang:masterfrom Ryman:mandelbrot_perf

Commits on May 14, 2014

shootout-mandlebrot: calculate two bits of the result per inner loop, +10-15%
Ryman
committed

Commits on May 15, 2014

shootout-mandelbrot: Precalc initial values & use SIMD in the main loop. +80-100%
Ryman
committed