EDIT: I was saying "However" too much.
My computer is an OK piece of hardware. When I first downloaded Minecraft, I got a steady FPS rate of around 35-50 FPS (which is pretty good for a laptop). However, when playing in 1.7, my framerate drops to around an average of 20. Also, occasionally when the sun sets or rain begins, it causes a huge lag spike that lowers me down to 9 FPS max. This occurs much more frequently during extended periods of play. Next, after about a half hour, I run into an FPS barrier. My framerate drops to around 3-5 FPS and occasionally freezes, and it takes about 10 minutes to recover and go back up, whether I continue playing, exit Minecraft, or shut off my computer. Also, when it does go back up, my framerate hovers around 10-13 FPS and only exiting MC for ~5 minutes will bring it back up. I never had these problems in 1.6 or 1.5.
MC-66454
Extreme FPS drop when playing for extended periods of time
Resolved
Incomplete
0
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases. If this has been done, we can reopen the issue.
Keep in mind that the "Resolved"-Status on this ticket just means "Answered", and that we are waiting for further information on whether this issue still exists or not. We will reopen it as soon as the requested information has been delivered.