manage-arguments does NOT work

output

4.6.85.31
Function  is not optimized
Function  is not optimized
Function  is not optimized
Function  is optimized

setup.sh

npm i v8-natives manage-arguments

x.js

// Generated by LiveScript 1.4.0
(function(){
  var v8, MA, S, fs, i$, len$, f, slice$ = [].slice;
  v8 = require('v8-natives');
  MA = require('manage-arguments');
  S = function(it){
    var i$, x$, len$, results$ = [];
    for (i$ = 0, len$ = it.length; i$ < len$; ++i$) {
      x$ = it[i$];
      results$.push(x$);
    }
    return results$;
  };
  fs = [
    function(){
      var a;
      a = slice$.call(arguments);
      return a.sort();
    }, function(){
      var x;
      x = MA(arguments);
      return x.sort();
    }, function(){
      var x;
      x = S(arguments);
      return x.sort();
    }, function(){
      var x, res$, i$, x$, len$;
      res$ = [];
      for (i$ = 0, len$ = arguments.length; i$ < len$; ++i$) {
        x$ = arguments[i$];
        res$.push(x$);
      }
      x = res$;
      return x.sort();
    }
  ];
  console.log(v8.getV8Version());
  for (i$ = 0, len$ = fs.length; i$ < len$; ++i$) {
    f = fs[i$];
    v8.helpers.testOptimization(f);
  }
}).call(this);

x.ls

require! {
  'v8-natives': v8
  'manage-arguments': MA
}

S = -> [.. for it]
fs = [
  (...a) -> a.sort!
  ->
    x = MA arguments
    x.sort!
  ->
    x = S arguments
    x.sort!
  ->
    x = [.. for arguments]
    x.sort!
]

console.log v8.getV8Version!
for f in fs => v8.helpers.testOptimization f