Explain Which of the following is a best practice to measure time taken by a process for execution?

Question

Which of the following is a best practice to measure time taken by a process for execution? (a) System.currentTimeMillis() (b) System.nanoTime() (c) System.getCurrentTime() (d) System.getProcessingTime() I got this question in an internship interview. This is a very interesting question from Coding best practices in portion Autoboxing & Miscellaneous of Java Select the correct answer from above options

Answer 1

Right answer is (b) System.nanoTime() The best explanation: System.nanoTime takes around 1/100000 th of a second whereas System.currentTimeMillis takes around 1/1000th of a second.