euphoria83 euphoria83 - 6 months ago 47
Java Question

Array or List in Java. Which is faster?

I have to keep thousands of strings in memory to be accessed serially in Java. Should I store them in an array or should I use some kind of List ?

Since arrays keep all the data in a contiguous chunk of memory (unlike Lists), would the use of an array to store thousands of strings cause problems ?

Answer: The common consensus is that the performance difference is minor. List interface provides more flexibility.


I suggest that you use a profiler to test which is faster.

My personal opinion is that you should use Lists.

I work on a large codebase and a previous group of developers used arrays everywhere. It made the code very inflexible. After changing large chunks of it to Lists we noticed no difference in speed.