Bug/Issue Singleplayer lag spikes

My game is constantly produces short stutters with input delay, exactly like a latency problem, except I'm only in singleplayer. I imagine this has something to do with the fact the game uses a local server for singleplayer to enable the easy quick-start MP session, and I'm fine with that, but it there any way for me to have a smooth experience when playing by myself?

I'm 99% sure this isn't a resources issue. I'm running windows 8.1 64-bit, fully updated, with 16GB RAM and an AMD FX-8350 processor, 8-core at ~4GHz. The GPU is an AMD Radeon R9 200-series with about 4GB VRAM (N.B. this video card has a known graphical flicker issue I had to solve by disabling vsync in the config files, though the lag spikes happen with or without this change) and I don't run many other programs while playing - certainly not enough to have the system anywhere close to its limits while everything else is idle, according to task manager.

I was a pre-order backer and love the game to death, but every time I start playing again this issue progressively decays my enjoyment of the experience (it does to combat exactly what you think lag spikes would) and across several years and two systems I haven't been able to find a fix for the issue. Any advice would be greatly appreciated.

 

Well... i dont know how to help you.
But i can give you a tip: download Notepad++ (its free!), then turn off (remove true and write false) vsync that is in starbound.config
I tried it, because my game was also lagging, and i think it should help you if your game lags.

 

Already done. As I said in the post, I had to do that to remove a graphical glitch already. And it's not frame lag, the game is rendering at a smooth 60FPS. It's input/computational lag followed by everything "snapping" to catch up, just like if an online game lags for a second. Except it's happening in singleplayer.

 

This has nothing at all to do with vsync. Forget I said anything about it. The same behavior is exhibited no matter whether I have it on or off, I only have it off to deal with a completely unrelated graphical issue. The input delay happens infrequently when the client isn't receiving updates from the server for a fraction of a second, goes predictive, and then catches up, much like a lag spike. Except this is happening in single player, with the "server" on the same machine, with no network communication involved.