Does assigning same value to datatype decrease efficiency?

For example, I have an infinite while loop which keeps assigning true to our testBool:

boolean testBool;

while(true) {

    testBool = true;

    ...more logic...
}

Are we wasting computation on reassigning the same value to our datatype, or are languages smart enough to recognize this inefficiency?

Solution

A smart compiler would pull it out of the loop.