The JVM doesn't, it starts in tens of milliseconds. But many popular Java frameworks take seconds to start (i believe mostly because they make heavy use of refl

The JVM doesn't, it starts in tens of milliseconds. But many popular Java frameworks take seconds to start (i believe mostly because they make heavy use of reflection and classpath scanning). You can write fast-starting Java apps, but you have to stray away from the beaten path to do it.