[MATH-1539] use System.arraycopy instead of loop for better performance.#143

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XenoAmess wants to merge 2 commits intoapache:masterfrom xenoamess-fork:use_System.arraycopy

+21-38

Commits on Jun 6, 2020

use System.arraycopy instead of loop for better performance.
XenoAmess
committed

Commits on Jun 7, 2020

change from -1>=0 to >=1 for better readability
XenoAmess
committed