Hi ,
You can experience the latency due to incorrect duplex settings . I would suggest you to configure the interface e0/3 to full duplex and also change the duplex of HP HP V1910-48G switch to full duplex. I would like to inform you that you can observe a interface flap which can drop the traffic when you change the duplex settings of the interface.
Please refer the below mentioned command to change the duplex settings:
# set interface <interface name> phy <full/half> <Speed>
# set int e0/3 phy full 100mb
Please refer the below mentioned KB article for the detailed infromation :
# https://kb.juniper.net/InfoCenter/index?page=content&id=KB5453&smlogin=true&actp=search
Let me know if this resolves the performance issue or not.
Regards,
Rishi