Lag...The bane of everyone's existence and typically the end for most modded minecraft worlds. Nether isn't really laggier than the main world; the opposite should be true (on a virgin untouched nether; one that hasn't been ravaged by pumps and all the other technological goodies that screw with lava flows and create all kinds of CPU overhead for all the block updating required). Nether has more spawn checking to be sure due to how mobs there (outside of fortresses) spawn; but typically less overall spawning space than the overworld.
On a server even in a void age you will still notice server tick lag and all that other happy stuff since worlds are still being kept loaded versus the listen server that's created in single player.
You could use mystcraft effectively for a void type age if you really wanted, however. You could even disable (via config) whatever you didn't want in mystcraft (examples being the crystals (one portal to one world only); age books themselves; hell even age symbols or the benches to create them).
I was told Mystcraft was not suitable just for a void age due to some bugs and issues that tend to come with the mod. Though I do thank you for the info I did hear about being able to create and lock I guess its called worlds on SMP.
The world isn't lagging, the code is. Even if you create a flat plains world it will still eventually lag even though there is nothing out there.
Identifying what causes the lag is however extremely difficult. It could be anything from a single block, a specific addon or a combination of addons that only occurs under very special circumstances. Even your server could be lagging form outside influence (unless you happen to have an expensive true root server with exclusive access, but then it could still be network). The only real way to figure out the lag would be to have the server run with a special performance measurement tool that will then tell you which part of the code is actually taking how much time. But then someone still has to fix that. ![wink ;)](https://forum.industrial-craft.net/core/images/smilies/smiley3.png)
I know the world is not lagging. This is not Server TPS but rather Client FPS I'm pointing out. Being a admin of a semi large community, we tend to have a lot of players on lower spec computers. Being able provide a more building area that is more lag free say 1 layer of grass and nothing else clearly offers superior client fps boost as their is less things to render and I think that's mainly due to lighting? I do run jvisual vm on my server often to see what related is causing some issues.
I though this might be a little related:
forums.bukkit.org/threads/info-admn-performance-monitor-v1-7-1-1-4-5-r0-3.86916/
Of course you can only indentify some problems but still usefull.
Downside is the bukkit. Good side there is an actual tps mod tell you the TPS per world. Letting you know at least what world might be failing.
Overall guys this was not about lowering the TPS though it would help when it comes to loading and unloading chunks as there is none to load really but was related to client FPS for larger and bigger and more complex builds and squeezing that extra fps!