Improve performance#1

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twoeths wants to merge 7 commits intomasterfrom

tuyen/chainsafe-standard

Commits on Dec 21, 2020

Pass unit tests
twoeths
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Commits on Dec 27, 2020

Debug in vscode
twoeths
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Commits on Dec 28, 2020

Commits on Dec 29, 2020

Implement readOnlyForEach readOnlyMap toTS
twoeths
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Commits on Dec 30, 2020

Chainsafe standard setup, more tests
twoeths
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Commits on Jan 2, 2021

Add clone()
twoeths
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