So if you have not tried profiling your code, try NetBeans or the JProfiler demo on some code and be amazed at what is going on.Īnd if you want some more speed in your PDF Viewer, learn more in release notes. It actually turned out to be 5 times faster if we called it twice instead, first to see how many bytes are created and then again with a byte array to store the data in… In one routine, we generated some data and wrote it to a ByteArrayOutputStream. If you can reduce calls to some routines it will make it faster without having to change code. Profiling also tells you where it might be worth caching values. If you take a routine used 30% of the time and make it 10% faster (a much easier task) you will get 3 times the benefit. This can happen if there are too many sensors that base on TCP are opening ports to quickly (i.e.
#Cant use jprofiler free
If you take a method that takes 2% of the time and makes it twice as fast, the code will be a petty 1% faster. Address and port are already in use' usually appears if PRTG cant find any free ports between 1024-5000. Other methods are not worth bothering with. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators. Methods that are frequently called or used often are worth looking at.
Also outside the advertisement block, I personally like JProfiler a lot because it does what it does very very good.It really worth the money because it gives you deep insights how your application performs under the hood. The two we use are the built-in NetBeans and JProfiler. JProfiler is a great commercial tool for profiling Java application and costs around 400. classes that have loaded before the profiler agent attached cannot be instrumented at all. In the Java world, we are lucky to have lots of profiling tools. You can use a web browser to check the profiler agent status. These are the sections that are worth improving. Not only does it give no benefit, it probably makes that code harder to support and may introduce bugs.īefore you can do this, you need to find the bottlenecks – which bits of the code are used most. With this plugin, selected run configurations can be profiled with JProfiler from within IDEA.
Every so often we set aside some time to just focus on making our code run faster.ĭon’t optimise code where speed does not matter. The official JProfiler plugin for JProfiler by ej-technologies.
One of my favourite coding activities is profiling – taking a Java application and making it run faster. He has an MA in Medieval History and a passion for reading. Mark Stephens Mark has been working with Java and PDF since 1999 and is a big NetBeans fan.