Code for performance. Here are some ways to code with the aim to achieve the best performance:

• Use local variables. It is quicker to access local variables than to access class members.
  
  
• Avoid string concatenation. String concatenation decreases performance and can increase the application's peak memory usage.
  
  
• Use threads and avoid synchronization. Any operation that takes more than 1/10 of a second to run requires a separate thread. Avoiding synchronization can increase performance as well.
  
  
• Separate the model using the model-view-controller (MVC). MVC separates the logic from the code that controls the presentation.