No reflect for plain arrays

[cergxx]

draft proof of concept for #1122

[jkaflik]

@cergxx would you like to continue on this PR?

[cergxx]

@cergxx would you like to continue on this PR?

Yes, if you approve this approach.
As I see it now, I need to add the missing types to appendRowFast() and polish the code (better naming, comments etc)

[jkaflik]

@cergxx I am totally fine with such an approach. Please let me know if you need anything from me.

[CLAassistant]

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1 out of 2 committers have signed the CLA.

✅ cergxx
❌ Sergey Salnikov

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[cergxx]

Recreated in #1130