The A is faster. The difference would be especially visible if you have some triggers or table rule validations.
>Which is faster?
>
>(A)
>Replace field1 with something, ;
>field2 with something,;
>field3 with something,;
>field4 with something
>
>or
>
>(B)
>Replace field1 with something
>Replace field2 with something
>Replace field3 with something
>Replace field4 with something
If it's not broken, fix it until it is.
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