There are certain Java APIs that we use in our everyday programming:

UUID Generation
System.getProperty()
Hashtable.get()
HashMap.get(), HashMap.put()
Collection.clear()
ArrayList.clear()
Threads
& a surprise API

Even though we use them everyday, we may not be aware of their notorious performance side effects. In this video, I have discussed those APIs and their performance impacts on our applications.

Video link: https://youtu.be/pBiaSYsQF2k