Javascript Performance Optimization

I just finished a recent project and used some time to summarize JS:

The javascript performance optimization involves the following two aspects:

I. download time:
Delete comments, delete tabs and spaces, and delete all line breaks.
Compress JS files.

Ii. execution time:

1: use local variables
2: Avoid with statements
3: Reduce eval usage
4: select the correct oneAlgorithm
5. Reverse Loop
6: Flip Loop
7: Expand the loop
8: optimize the if statement
If there are many conditions, you can use switch case
9: String connection
If there are more, you can use array and join
10: the built-in method is preferred.
11: store common values.
12: array is used, and the object literal is used.
13: Saving the use of Dom file fragments

Pay attention to this and your JS performance will be greatly improved.

For personal ignorance, please advise!