add.js

function add(a, b) {
  return a + b;
}

// 1. IC feedback unitialized
add(23, 44);
// 2. now it's pre-monomorphic
add(2, 88);
// let’s optimize 'add' on its next call
%OptimizeFunctionOnNextCall(add);
add(2, 7); // now we call our optimized function, feedback has been collected, let's see whether we can retrieve some deopts reason.