We filed a K-1 Fiance Visa petition with USCIS (California Service Center) on April 14, 2017 and received the USCIS approval notice on August 24, 2016:
USCIS Filing Date: 4/14/2017
Received I-797C Notice of Action for I-129F: 4/19/2017
Received I-129F Approval Notice: 8/24/2017
Processing time from Filing with USCIS to Approval: 132 days
I-129F USCIS I-797 #: WAC-17-902-90775
Source: h1b now