Though its stock price is up 11% year to date, Palo Alto Networks (NYSE: PANW) is lagging well behind most of its peers, including FireEye (NASDAQ: FEYE) and Check Point Software (NASDAQ: CHKP), to name but a couple.At first glance, Palo Alto's relatively meek performance may seem odd given it's growing the top line considerably faster than FireEye, Check Point, and others.