What's this Icon mean?

[arjunpaliath]

Can anyone help me understand what the highlighted icon means? 

Been on my notification bar from today morning.

Thanks in advance. 

[ѵօϲɑӀ4ӀօϲɑӀ · Accepted solution]

That means Enhanced performance.

One one UI 3 they removed High performance mode and introduced Enhanced processing.

If that helped or solved your query "Accept as solution" will be appreciated.

[arjunpaliath]

thank you Vocal, took some time to figure it out myself 😅

[invisibility029]

sorry i don't have note series 😅. and I'm running on one ui 2.5😭