I imported my data with joern, but when I wanted to produce pdg diagrams, the query speed became slower and slower with the for loop.The code used for query is as follows. I used cprofile to analyze and found that there was a problem with this function.

def getUSENodesVar(db, func_id):
    query = "g.v(%s).out('USE').code" % func_id
    ret = db.runGremlinQuery(query)
    if ret == []:
        return False
    else:
        return ret

I hope to improve the speed of inquiry.