I measured with the following code.
public static void main(String[] args)
{
boolean myVariable = true;
long startTime = 0;
long endTime = 0;
long duration1 = 0;
long duration2 = 0;
for(int i=0; i<1000; i++) {
startTime = System.nanoTime();
myVariable = !myVariable;
endTime = System.nanoTime();
duration1 += (endTime - startTime);
startTime = System.nanoTime();
myVariable ^= myVariable;
endTime = System.nanoTime();
duration2 += (endTime - startTime);
}
System.out.println("The duration for the first operation is :" + (duration1/1000));
System.out.println("The duration for second operation is :" + (duration2/1000));
}
and the results are (in nanoseconds)
The duration for the first operation is :140
The duration for the second operation is :123
Based on this analysis, the boolean ^= boolean is quicker than the boolean = !boolean.
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solved What is the quickest way to flip a Java boolean? [closed]