Speed Up your JavaScript

• Change DOM by CSS Class not actual CSS
• Avoid deep arrays
• Don't touch DOM every time
• Avoid for-in loop
• Use Async as much as possible
• Objects and arrays both are much slower then variables, so use var as much as possible
• GET JSON instead of HTML view
• Use Closures
• When using loop try to combine control condition and variables as it speeds up the iteration
• Make use of scope to create reusable objects and components
• Use native JS as much as possible