function test() {
    // some code here to optimize
}

%OptimizeFunctionOnNextCall(test);
test();

// ./d8 test.js --allow-natives-syntax --trace-turbo --trace-turbo-path turbo_out --trace-turbo-filter test

function test() {
    // some code here to optimize
}

%PrepareFunctionForOptimization(test);
test();
%OptimizeFunctionOnNextCall(test);
test();

// ./d8 test.js --allow-natives-syntax --trace-turbo --trace-turbo-path turbo_out --trace-turbo-filter test

My question is what is the difference between using ‘%OptimizeFunctionOnNextCall()’ alone and using ‘%OptimizeFunctionOnNextCall()’ accompanied with ‘%PrepareFunctionForOptimization()’.

Thanks for your time taken to help me!