Change eval for Function class

[francisco-giancarelli-crombie]

I see in the code that nucleoid runtime is using eval to ultimately run the code. eval is expensive and will make the runtime far more slow than plain NodeJS, more on that here https://www.educative.io/answers/eval-vs-function-in-javascript. I think nucleoid could use Function class instead to get performance closer to NodeJS.

[canmingir]

Mostly we are using eval for assigning/resolving value of variable, in our case, it looks like eval is much faster than Function

let a;

const b1 = Date.now();
for (let i = 0; i < 1_000_000; i++) {
  a = Function("return 1 + 2")();
}
const a1 = Date.now();
console.log(a1 - b1); // ~375

const b2 = Date.now();
for (let i = 0; i < 1_000_000; i++) {
  a = eval("1 + 2");
}
const a2 = Date.now();
console.log(a2 - b2); // ~125

Do you have anything else in your mind?