To file my I-140 in premium or not

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My Priority Date just got current for EB2 India and would like to get some advise before I file my required documentation to USCIS for both I-140 and I-485.

1. How long is the current I-485 processing time ?
2. Is it wise to file my I-140 in premium where by paying $2800 along with I-485 or will it be waste of money since I-485 anyways takes lot of time ?

Please guide.