title: What is "Compile Time" in VisualGC?
body: <p>VisualVM has an official plugin called "VisualGC". In the VisualGC tab, there is a "Compile Time" meter displaying number of compiles and time spent.</p>
  
  <p>The meter shows up on any OS with OpenJDK JVM 6+, Oracle Hotspot JVM 6+ no matter what GC method/parameters are specified.</p>
  
  <p>What does the "Compile Time" mean?</p>
  
  <p>Does it become a concern if the compile "time spent" shows many minutes?</p>