blog.kdgregory.com

A few weeks ago I answered a Stack Overflow question about the poor performance of Java Lambdas. I gave some general suggestions, but didn...

Question: when does an O(N 2 ) algorithm outperform an O(NlogN) algorithm? As part of my article on primitives, I decided to implement ...

The last post “turned an object inside-out” to eliminate the overhead of a list of discrete objects. While that technique allows you to pac...

It may seem strange to talk about “living among primitives” and then jump to data structures, but the truth is that most programs work with...

There are a lot of people who say that Java shouldn't have primitive data types, that everything should be an object. And there is some...

Last week Terracotta released BigMemory , which stores objects outside of the Java heap and “defuses the GC time bomb.” Since I've writ...

A lot of programmers have the belief that String.intern() can be used to speed up if - else chains. So instead of writing this: public ...

Have you ever seen code like this? private String foo(String arg1, int arg2) { StringBuilder buf = new StringBuilder(); buf.appen...

So why would someone who's writing a servlet worry about the time taken for a cast? I can't believe it's due to a fear of softw...

I've a Servlet filter which performs the following type cast [...] What is the performance impact of such a cast? Is it worth to accept...