Since updating to Version 5.0.3, the mod has been practically unplayable. Every 10-15 seconds, there are huge lag spikes that max out all cores on my CPU to 100% as well as causing any other open programs to freeze(including the Windows Desktop). This happens even if I set the graphics settings to the lowest possible. It also happens even if I have no other open applications except for the game itself. This has not happened when using an older version of the mod, like version 5.0.1 or version 5.0.0. I have no idea why this is happening, as I have not installed any major programs recently. I do have Avast Antivirus installed on my computer with the Behavior Shield activated, if that affects the performance of the mod.

System Specifications:
Java: 1.8.0_25(Same one the Minecraft Launcher uses)
OS: Windows 7 Professional
CPU: Intel i5 4400U @ 1.7Ghz Turbo Boost 2.4 Ghz
Graphics Chip: Intel HD Graphics 4200
RAM: 6GB DDR3 @ 1333Mhz
Minecraft Version: 1.10.2

I had this issue as well, and the issue was that I had external JSON files enabled on my client. Some Body let me know that if you disable them, it should be fixed.

https://pastebin.com/9UDhuvC7

This ticket is expired. If you believe this is still an issue, please make a new ticket.