osx sierra intellij spring boot jdk 8 slow startup

My spring boot applications startup time was very long with jdk 8. There is no problem with jdk 9. A simple application without any code startup time was over 15 seconds. Now it starts under 5 seconds. I find solution in stackoverflow :

solved the problem by adding my Mac hostname (i.e. Macbook.local, or whatever your Mac is called) on the /etc/hosts file mapped to the 127.0.0.1 address as well as the ::1 like this:

127.0.0.1   localhost mbpro.local
::1         localhost mbpro.local

To learn your hostname, type hostname in the console.

https://stackoverflow.com/questions/39636792/jvm-takes-a-long-time-to-resolve-ip-address-for-localhost

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How to Toggle Within and Between Apps in OS X

  • Toggling between open programs is Command + Tab
  • Toggling up a minimized program is Command + Tab with Option on release
  • Toggling between tabs is Command + Shift + [ or ]
  • Opening a new tab is Command + t
  • Closing a tab or window is Command + w
  • Toggling windows of the same application is Command + (next to shift in english keyboard)

source : http://computers.tutsplus.com/tutorials/how-to-toggle-within-and-between-apps-in-os-x–mac-56503

Taking screenshot of selected area on the screen to desktop: Command + Shift + 4