How do I measure JVM startup time?

https://stackoverflow.com/questions/39321345/how-do-i-measure-jvm-startup-time

PrintCompilation2

https://github.com/openjdk-mirror/jdk7u-hotspot/blob/master/src/share/vm/compiler/compileBroker.cpp

http://docs.oracle.com/javase/7/docs/platform/jvmti/jvmti.html 

https://blog.codecentric.de/en/2012/07/useful-jvm-flags-part-2-flag-categories-and-jit-compiler-diagnostics/

https://stackoverflow.com/questions/17536012/where-what-is-the-output-of-hotspots-xx-citime-flag

https://yq.aliyun.com/articles/129629