EMR notebook Slowness Issue - isgaur/AWS-BigData-Solutions GitHub Wiki
Remove the following from ~/.sparkmagic/config.json via Terminal to resolve Slowness Issue
"session_configs": {"conf":{"spark.pyspark.python": "python3","spark.pyspark.virtualenv.enabled": "true","spark.pyspark.virtualenv.type":"native","spark.pyspark.virtualenv.bin.path":"/usr/bin/virtualenv"}}