Lag spikes in the nether (minecraft)?

Does anyone have any tips on how to reduce lag spikes? Specifically in the nether. I've gotten like 3 lag spikes ever on the overworld, so it's not really an issue up there. I already tried using optifine and using pure vanilla minecraft to no avail. I believe optifine did help, but I still get a reasonable amount of lag spikes in the nether either way. I have good/adequate FPS the whole time (approximately 50 FPS), including the moment before and after a lag spike. The lag spikes only last like 1 second at most, but happen frequently. If anyone has another lag spike reducing mod/program in mind, i'm all ears for that!