fix int2byte() import and performence update.#346

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naihe2010 wants to merge 4 commits intojulien-duponchelle:mainfrom

Commits on Apr 12, 2021

fix int2byte() import.
naihe2010
committed

Commits on Apr 21, 2021

Commits on Apr 29, 2021

fix the byte2int import in tests.
naihe2010
committed