I know that difference between using single quote instead of double quote is that variables aren’t expanded.
$a = "hello"
"$a world" # hello world
'$a world' # $a world
I am accustomed to use double quote, but I guess that single quote could be more efficient. Is this always true? Is there some documentation about this topic? I googled a bit but results are overwhelmed by explanation about expanding variables
Efficiency is very probably a non-issue if you don’t have embedded variables or subexpressions.
A quick test with
Measure-Command showed no difference at all.