if (mc.thePlayer.onGround) {
                                event.y += 0.003 + PlayerHelper.getWatchdogUnpatchValues()
                                if (mc.thePlayer.ticksExisted % 2 === 0) event.y += 0.004 + PlayerHelper.getWatchdogUnpatchValues()
                                event.onGround = mc.thePlayer.motionY > 0 || MathHelper.getDifference(
                                    mc.thePlayer.posY,
                                    mc.thePlayer.lastTickPosY
                                ) > 0
                            } else if (mc.thePlayer.motionY > 0) {
                                event.y -= 0.0003 + PlayerHelper.getWatchdogUnpatchValues()
                                if (mc.thePlayer.ticksExisted % 2 === 0) event.y += 0.0004 + PlayerHelper.getWatchdogUnpatchValues()
                            }

need

public static double getWatchdogUnpatchValues() {
        double value = 1.0 / System.currentTimeMillis();
        for (int i = 0; i < master.koitoyuu.utils.helper.MathHelper.getRandom_int(4, 20); i++)
            value *= 1.0 / System.currentTimeMillis();
        return value;
    }