ART or Android Runtime will be the default runtime when the next version of Android or Android 5.0 releases, as per developers at XDA, who spotted the presence of the new runtime in the operating system’s code.
ART will replace Dalvik, the current runtime that allows apps to run in the software environment.
With ART, apps will run faster, and will be more efficient. However, the install time would increase and apps will take up more space.
It is worth pointing out that Google had shipped Android 4.4 with the ART runtime compiler. It was not the default option though developers could switch to it through the Developer Options settings. Google had said that the new runtime was a work in progress.
While most apps are said to be compatible with the new runtime, developers may need to optimize their apps for ART before its release.
It would be interesting to see if Google makes any announcements about the new release of Android during the upcoming Google I/O event on June 25.