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Java Performance Tuning

Writing well-performing applications is hard, regardless of the language or platform you use, and Java is not any exception. Besides the most common performance issues, Java performance calibration presents its own complicated problems. For a quick example, understanding and managing the most sought concept of Java is its garbage collection.

But this doesn’t mean that optimizing your application and other related things will go in vain nor that you just need to be a professional so as to try to do so. So it is suggested to learn Java to handle these sorts of issues. There are many easy and simple to follow recommendations and best practices that will assist you to build a well-performing and flawless application.

This article will cover all the tips for fine tuning Java Performance, starting with those that are language agnostic to the ones more specific to the Java platform. Before getting started, check out the little heads up with most common Java performance issues. Always Monitor transactions across JVMs and every other tiers, auto model your application, visualize what dependencies exist with alternate and other JVMs, wherever time is spent, and wherever issues exist. Improve Java performance by instantly jotting down to technical details to ascertain SQL statements, method arguments, return values, exceptions or log messages.

  • Optimize only if necessary
  • Fine Bottleneck using profiler
  • Devise performance test suite for entire application
  • Always try to resolve biggest bottleneck first
  • Use StringBuilder for concatenating
  • Use + to concatenate string
  • User primitives
  • Aviod BigDecimal and BigInteger
  • Use Apache StringUtils.replace instead of String.replace
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