Language compilation optimizations

[filipeom]

Stuff like:

  function setInternalProperty(___internal_esl_global, object, pname, pvalue) {
    object[pname] := pvalue;
    return [false, null]
  };
  function l_len(___internal_esl_global, lst) {
    __v6290 := extern l_len_external(lst);
    return [false, __v6290]
  };

Could benefit form an @inline annotation to avoid unecessary functions calls

[filipeom]

This pattern also repeats a bunch:

__v4877 := []
symbols := __v4877

Generalized:

__v0 := <Constant value>
code_var := __v0
// Ideally, this would inline to:
code_var := <Constant value>

Seems wasteful having a fresh var to hold a constant

[filipeom]

Each optimization technique should be addressed as a separate issue