In just one of my worlds, the game ticks seem to slow down. Levers take over 15 seconds to change states when pulled. Doors take the same time to open when activated by redstone.
This only happens in certain areas. For example, inside a floating structure I am creating, where the outside world is not visible at all except through glass, the framerate and ticks are fine. But whenever I can see the outside world NOT through a transparent block, the framerate slows to about 20% of its standard rate, and the game ticks slow.
Sometimes, it jumps to about 70% normal framerate, and the tick rate becomes normal for just a split-second, but then everything goes back downhill.
This was NOT fixed yet. At least the phantom fire charges in my last post have been.
Note: I am using some Minecraft mechanics exploits. One device that exploits it is a wireless redstone transmitter. However, this is not causing my problems. Even when I turn the transmitter off, the problem persists. However, I am wondering if it has something to do with the fact that it's just there.
Another note: Only ONE of my seven existing Minecraft worlds actually has this problem. This does not occur when playing on a multiplayer server or LAN world.
EDIT: I accidentally labeled it as "crash". That was wrong; there is no crash. It's just a bug. I removed the erroneous label.
EDIT: Another related ❓ problem was found. When I open the bugged world, the game takes me back to the home screen. If I wait for about 30 seconds, it successfully loads, but it takes another 30 for the 1st chunk to start loading, which means that I start falling, falling, falling until the chunk loads and I am correctly positioned.
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How to do that, exactly? And there isn't ever an error message. It's just a problem, and Minecraft doesn't detect it.

Create a new file in Notepad, and paste in the code. Save the file as minecraft.bat, and place the file in the same folder as minecraft.exe. The .bat extension saves the file as a batch file. Double click minecraft.bat, and Minecraft will run.

Just one thing - where's minecraft.bat?

Create a new file in Notepad, and paste in the code. Save the file as minecraft.bat, and place the file in the same folder as minecraft.exe. The .bat extension saves the file as a batch file.

Is minecraft.exe the same as .minecraft, minecraft.jar, or something different? Where would I find it if it's something different?

How do you start minecraft?

I do it through the default launcher with the update logs and stuff.
So is minecraft.exe just the launcher? Then where is the file?

So you're starting it through the minecraft.exe? Place the minecraft.bat file right beside it.

The notepad file? While the launcher is open? Or is it like a file or something?
P.S. The saving of the .bat file did work. Instead of being saved as "minecraft.bat", it got saved as just "minecraft". Good sign, right?

Save the file as minecraft.bat, and place the file in the same folder as minecraft.exe. The .bat extension saves the file as a batch file. Double click minecraft.bat and the game will start.

It isn't working, clicking on minecraft.bat, since it's not anywhere NEAR the minecraft.exe. I'm putting it in .minecraft to see if that helps. I can always remove it if it causes trouble.

And that didn't work so I'm putting it in "bin". After that if that doesn't work I'll put in minecraft.jar or a folder that looks nice.

Again the question what do you click to start minecraft?

Nope, still didn't run. What to do?!

Most issues like these come from a corrupted world, unless you can provide that console output that states otherwise, resolving as duplicate of MC-3766.

Part of MC-3766 does occur in my corrupted world. I really worked hard on the thing and don't have MC edit to move it around from world to world. The intense lag and slow ticks occur. Crashing, however, doesn't occur, making it a non-duplicate of that. This is a quite unique issue as far as I've seen posted. Anyway, where is the minecraft.exe shortcut or file?

Anyway, where is the minecraft.exe shortcut or file?
3rd time that I ask this question: what do you do to start minecraft normally?

Never mind, I deleted the world. It likely came from a bad hard drive defrag. And to answer your question, I use the icon on my desktop, minecraft.exe. It runs fine now, I might want to delete this post, if I can...

I am Experiencing this bug in Snapshot 14w04b
Redstone and just putting down entities (carts, frames) take along time to actually do something, Redstone ticks about 2 seconds per tick instead of 1/10 of a second.
items are not picking up fast enough.
but If I go back to 1.7.2, it is all fine and working again
I dont know if I should make a new issue or if you want to reopen this one.
but I am experiecing it in the newest snapshot.
Please start Minecraft by
minecraft.bat
and attach
log.txt
anderror.txt
after the error occured.