Tip 1: Use Chrome DevTools
Tip 2: Minimize DOM Manipulation
- Memory Leaks: Memory leaks occur when the application doesn’t free up memory that is no longer required. This can occur when variables are not properly released from memory, or when objects are not properly destroyed. A good way to address memory leaks is to use a browser’s development tools to identify memory leaks in real-time and then address them as soon as they are detected.
- Avoid global variables: Using global variables can quickly consume memory. Instead, use local variables and limit their scope to where they are needed.
- Clean up event listeners: Removing event listeners when they are no longer needed can free up memory. Use the
removeEventListener()method to clean up.
- Use object pooling: Object pooling is a technique where you recycle objects instead of creating new ones. This can significantly reduce memory usage.
- Minimize DOM changes: Manipulating the DOM can be expensive in terms of memory. Minimize the number of changes you make by batching them together.
- Avoid circular references: Circular references occur when two objects reference each other, creating an infinite loop. This can cause memory leaks, so it is important to avoid them.
- Use let and const instead of var: Use let and const to declare variables instead of var. This will ensure that variables are only scoped to the block they are declared in, which helps to prevent memory leaks.
- Remove event listeners: When you add an event listener to an element, it creates a reference to that element in memory. If you don’t remove the event listener when the element is removed from the DOM, this reference will remain in memory and can become a memory leak. Be sure to remove event listeners when they are no longer needed.
- Clear your intervals and timeouts: If you create an interval or timeout, be sure to clear it when it’s no longer needed. Otherwise, the function associated with it will continue to run and could cause a memory leak.
The garbage collector works by periodically scanning the memory heap of the program and identifying objects that are no longer in use. It then marks them as eligible for removal. The garbage collector then runs a cleaning process that removes all the marked objects from memory, freeing up that space for further use.
This entire process occurs in the background and is transparent to the developer. However, it is essential to understand how garbage collection works to write efficient and performant code. Poor use of memory can lead to slowdowns or crashes in the program.
Identify and optimize memory-intensive code
Use memory management libraries and frameworks