Reports local variable of wrapper type which has most of its usages primitive.

In some cases, boxing can be source of significant performance penalty, especially in loops.

Example:

  public void example() {
    Long l = 12L;
    needBox(l);
    for (int i = 0; i < 10; i++) {
      needPrimitive(l); // Loops usages considered as more often
    }
  }

  void needPrimitive(long l) {}
  void needBox(Long l) {}

New in 2018.2