CODEWITHSUNDEEP
javaterminology
Daniel Williams
Daniel Williams

Reputation: 9304

What is HotSpot?

I just heard of the HotSpot JVM, as opposed to the Oracle JRockik JVM. What is Hotspot? Is this old the Sun JVM, or something else?

Upvotes: 2

Views: 1744

Answers (4)

Player_Neo
Player_Neo

Reputation: 1655

Java applications are compiled into bytecode using javac. During application runtime, the JVM loads class files into memory and analyzes the program’s performance for hot spots; hence the name “HotSpot JVM”. The just-in-time (JIT) compiler compiles parts of the application which are executed repeatedly into native machine code. JIT compilation, however, requires processor time and memory which affects the startup time of the application.

source to my answer

Upvotes: 0

Umesh Kacha
Umesh Kacha

Reputation: 13666

Oracle's JVM is called HotSpot.

Upvotes: 0

Edwin Buck
Edwin Buck

Reputation: 70909

HotSpot is the shipped Sun JVM which has support for just-in-time compilation of heavily used sections of code.

For all practical purposes, it is the "Sun JVM" or now the "Oracle JVM". Note that this is the same JVM which was open sourced, so it is also the "OpenJDK JVM".

Way back when, Sun did release a non-JIT capable JVM, but that's long enough ago that the odds of encountering it are minuscule.

Upvotes: 6

Peter Lawrey
Peter Lawrey

Reputation: 533492

AFAIK, its the old Sun JVM which is now part of OpenJDK and therefor a reference for many other implementations.

Upvotes: 0

Related Questions