Performance Design Guidlines

• Model.attributes and __attributes must be an object. Avoid operations and approaches deoptimizing it to hash.
  • don't delete elements
  • all known elements must be initialized in constructor in the same order.
  • always use dedicated constructors for copy and creation.
• Avoid generic functions, rely on attribute and model type information whenever possible.
• Don't write to function arguments, avoid passing 'arguments' through.
• Avoid exceptions
• Avoid polymorphic functions and calls, if it's not absolutely necessary. Both, ad-hoc and parametric.
• Use duplicated specialized functions for hot spots.
• Use loop unrolling with compilation to Function for hot spots.
• Avoid long functions