Samsung Galaxy S3 became working slow

[Android Central Question]

Samsung Galaxy S3 (SHV-E210S Tmobile korean) became working slow some time after startup. then restart same result. then remove the battery and wait five time and turn on, but same result. Coincidentally it was normly and working fine.
how to fix it.
its root with Kingo ROOT android v 4.4.4

9.3GB used 16Gb free memory

0.94GB used 749 MB free RAM