String Deduplication – A new feature in Java 8 Update 20
Strings consume a lot of memory in any application. Especially the char[] containing the individual UTF-16 characters is contributing to... Read more
Posts about Performance
20% time interviews – Allocation Tracker
08/07/14
A few weeks ago, I started a project called “PYP – Promote Your Project”. Its about how the employees at... Read more
Fixing Garbage Collection Issues Easily
What do you do when your Garbage Collection runs all the time? Well usually you would try to introduce some... Read more
Elasticsearch Indexing Performance Cheatsheet
05/09/14
You plan to index large amounts of data in Elasticsearch? Or you are already trying to do so but it turns out that throughput is... Read more
Faster and Cleaner Code since Java 7
Every Java developer with more than a few months of coding experience has written code like this before: try {... Read more
Writing better Caches in Action: Improving Joda Time
Working with time and date in any programming language is a mess. To get an idea how much of an... Read more
Ceph Object Storage as fast as it gets or Benchmarking Ceph
03/03/14
CenterDevice is a distributed document management and sharing software without any single centralized component. In our next evolution we are... Read more
Why 35GB Heap is Less Than 32GB – Java JVM Memory Oddities
When I run the following Java program, which consumes all free memory with artificial data structures, something interesting happens. Something... Read more
Debunking the APM myth busters
Today I’ve read a blog entry by Roman Spitzbart that is titled APM Myth Busters: Sampling is as Good as... Read more