Using Spark to write a parquet file to s3 over s3a is very slow

I'm trying to write a parquet file out to Amazon S3 using Spark 1.6.1. The small parquet that I'm generating is ~2GB once written so it's not that much data. I'm trying to prove Spark out as a platform that I can use. Basically what I'm going is setting up a star schema with dataframes, then I'm going to write those tables out to parquet. The data comes in from csv files provided by a vendor and I