i have recently been playing on the latest snapshot with a few of my friends the server has been crashing alot we found that resting the world didn't help we also had 4GB of ram so we knew that ram wasn't a issue
when i was looking in F3 earlier today i noticed when i walked a few blocks that around 100-200 chunk updates would happen i wonder if this may of been the reason because if 5-10 people was to be updating 100-200 chunks in such a short amount of time this would be updating so many chunks it may cause the server to lag i also was testing on 1.7 and the chunk updates was not as high as the latest snapshot i don't know if the chunk updates are suppose to be so high but i don't know if this is reducing players fps
i did check to see if there were any duplicates but i saw none about the recent pre release but i did see some about snapshot 14w28b but apparently this was fixed but i still get alot of chunk updates sorry if this is a duplicate and if this isn't a bug.
Is this still an issue in the current Minecraft Snapshot 15w46a or later? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.