Deleting parameters to save running time?

[aca]

I notice that some instructions in my macros can be shortened, thereby saving nanoseconds of running time (presumably !), and the end result of the operation is still the same.
But is it so? Are there any drawbacks? is the time saved worth it, when I have to run many such instructions?
Some instances:

1)

Range("C2").Select
Selection.Copy

shortened to

Range("C2").Copy

2)

Range("C2").Select
With Selection.Interior
        .Pattern = xlSolid
        .PatternColorIndex = xlAutomatic
        .Color = 65535
        .TintAndShade = 0
        .PatternTintAndShade = 0
    End With

shortened to

Range("C2").Interior.Color = 65535

3)

Cells.Find(What:="2", After:=ActiveCell, LookIn:=xlFormulas, LookAt:= _
        xlPart, SearchOrder:=xlByColumns, SearchDirection:=xlNext, MatchCase:= _
        False, SearchFormat:=False).Activate

shortened to

Cells.Find(What:="2", After:=ActiveCell, LookAt:=xlPart, searchOrder:=xlByColumns, SearchDirection:=xlNext).Activate

Thanks for any enlightened answer.
ACA