AWS Certified Developer Associate Practice Test 2

A developer has pushed a Lambda function that pushes data into an RDS MySQL database with the

def handler(event, context):
    mysql = mysqlclient.connect()
    data = event['data']
    mysql.execute(f"INSERT INTO foo (bar) VALUES (${data});")
    mysql.close()
    return

On the first execution, the Lambda functions takes 2 seconds to execute. On the second execution

What can be done to improve the execution time of the Lamdba function?