LÖVE

has anyone else experienced any lag spikes? about every second the time of one frame will jump slightly.. it's not that big a deal but it looks bad and was just wondering =/

Are you accessing the hard drive at any point in your main loop? If you load a new image or sound you may experience a slight delay.

no, it even happens when I load the FPS demo, which only prints the current value for dt.

Hmm... you might have other applications running that are slowing things down. Do you notice this lag in other 3d applications? I had the same thing happen to me a couple years ago, it turned out to be due to the bandwidth monitor I had running in the background, because it was continuously updating its log files. I've noticed that some IRC clients can do this as well.

Its a vsync problem
A way to fix this is to either set it to fullscreen(witch means you have to do some hacking for most games) or set vsync to false(which I don't recommend,besides most don't use dt)
Old thread:
http://love2d.org/forums/viewtopic.php?f=4&t=2003

adrix89 wrote:most don't use dt

This isn't true.
My graphics drivers force v-sync off and I don't have a problem with most games.

Try set high priority for game application through the task manager.

thitem wrote:Try set high priority for game application through the task manager.

This is not only a really really bad idea, but it won't fix it, either.

It's a vsync issue. Just disable vsync and apply some common sense dt checks and you're good.

How would vsync cause this?

I have this problem too. And high priority fix it.
Maybe lag spikes have a another reason.