C#

Quote:

If you have a tree of objects and you are finalizing the root, then the children are still alive — because the root is alive, because it is on the finalization queue, and so the children have a living reference — but the children may have already been finalized, and are in no particularly good state to have their methods or data accessed.

Garbage Collector Basics and Performance Hints[^]:

Therefore, it is vitally important that finalizers do as little work as possible. Remember also that although all object pointers remain valid during finalization, it might be the case that those pointers lead to objects that have already been finalized and might therefore be less than useful. It is generally safest to avoid following object pointers in finalization code even though the pointers are valid. A safe, short finalization code path is the best.

Chapter 5 - Improving Managed Code Performance[^]:

* Implement Finalize only if you hold unmanaged resources across client calls.
* Keep finalizer code simple to prevent blocking.
- Do not issue calls that could block the calling thread.

6.0 * 35.274 / 2.20462 = 96.0002177246

OriginalGriff wrote:

I'm just guessing that you're a beginner

public class MyWeight {

   public decimal Weight { get; set; }
   public UnitOfMeasure Units { get; set; }

   public MyWeight( decimal weight, UnitOfMeasure units = UnitOfMeasure.Pounds ) {
      this.Weight = weight;
      this.Units = units;
   }

   public decimal InPounds( int decimalPlaces = 0 ) {

      decimal qty = 0M;

      switch ( this.Units ) {
         case UnitOfMeasure.Pounds:
            qty = Weight;
            break;
         case UnitOfMeasure.Ounces:
            qty = Weight * 0.0625M;
            break;
         case UnitOfMeasure.Kilograms:
            qty = Weight * 2.20462M;
            break;
         case UnitOfMeasure.Grams:
            qty = Weight * 0.00220462M;
            break;
         default:
            throw new NotImplementedException( string.Format( "{0} to Pounds.", Units ) );
      }  // end switch:

      qty = RoundUp( qty, decimalPlaces );

      return qty;
   }

   // Etc.