7 Understanding Java performance
This chapter covers
- Why performance matters
- The G1 garbage collector
- Just-in-time (JIT) compilation
- JFR—the JDK Flight Recorder
Poor performance kills applications—it’s bad for your customers and your application’s reputation. Unless you have a totally captive market, your customers will vote with their feet—they’ll already be out the door, heading to a competitor. To stop poor performance from harming your project, you need to understand performance analysis and how to make it work for you.
Performance analysis and tuning is a huge subject, and too many treatments focus on the wrong things. So, we’re going to start by telling you the big secret of performance tuning. Here it is—the single biggest secret of ...
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