The 4 Java Garbage Collectors – How the Wrong Choice Dramatically Impacts Performance When Garbage collection is one of those things that are generally known to impact performance, but beyond that – in terms of how it actually works – it’s pretty much a mystery to most of us. So, I thought I’d take a whack at covering the basics of GC, especially since this is an area that has seen some major changes and improvements with Java 8, especially with the removal of the PermGen and some new and exciting optimizations (more on this towards the end). When we speak about garbage collection, the vast majority of us know the concept and employ it in our everyday programming. Even so, there’s much about it we don’t understand, and that’s when things get painful. One of the biggest misconceptions about the JVM is that it has one garbage collector, where in fact it provides four different ones , each with its own unique advantages and disadvantages. The choice of which one to use isn’t automati...
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