https://marcellanz.com/post/file-read-challenge/

In January Stuart Marks published a blog post named "Processing Large Files in Java" as a response to a post by Paige Niedringhaus about "Using Java to Read Really, Really Large Files". Niedringhaus there reports her experience with JavaScript to solve a "coding challenge" where a "very large file" has to be processed and four specific questions where asked about the processed file. After solving the challenge in JavaScript, Niedringhaus then moved forward and successfully implemented a solution to the challenge in Java as she was curious about Java and how to do it in that language.

This article starts where Marks left and tries to improve on the performance aspect of the code further; until we hit the wall.