High Sierra - Terminal lags if background opacity is set

After upgrading, I noticed my terminal got extremely slow (MBP 2013). There is a noticeable input delay, moving the window or switching to another application lags and skips the animation. I noticed the background needs around 1s to recreate the opacity/blur effect after window switching, so I tried disabling the effect in the settings, which restored previous performance completely.
Is this a known issue? I'd like to have my transparent, blurred background back.

So, for completeness' sake since there doesn't seem to be a better answer as of yet, I'll add my solution.
If your Terminal.app started showing the behavior outlined in the question and you have modified the blur/opacity settings, turning these off will restore previous performance. To do so, open the terminal settings (⌘ + ,), switch to the Profile tab and click on the background color picker next to color & effects. Here, set the faders for opacity and blur to 100%.

If someone finds a way to enable transparency again without trashing performance, I'll be happy to accept their answer.

Ran into the same problem. For me it's just the blur effect. Transparency does not cause me issues. It seems to be the case for other terminal apps too, (I tried iTerm2, and as soon as I enabled it's blurred background effect it had the same performance issues). This is all since the High Sierra upgrade.

For now I'm disabling blur to get around the problem. Hope it gets addressed soon.