Straighten your image before Gimp

[ESH]

I worked with a large file in Gimp 3.2 RC1 - 6000 x 4000 pxxpx (not nice to Gimp but experimental).

Then I decided to straighten 5 layers 1.59 degrees clockwise around the center.

Shortly after I regretted not to have saved the image right before initiating the rotation (the current version could be a number of important steps old, so I decided to let the rotation in progress run). For the same reason Task Manager was not an option.
The rotation with the default Cubic interpolation took 1.5 hours!

Is anybody aware of - if I did something wrong? If so, how can this be done at a normal execusion speed - like at most 1 second in my old Photoshop CS5?

Is any plugin available for such manipulations?

I am of course a beginner with Gimp - and despite this waste of my time a kind of affection is developing. At least this product is open and free

[rich2005]

1 second in PS CS5 is very impressive. Is that using a psd file ?

Not as good in Gimp 3.2 RC1 but nowhere near one-and-a-half hours. A big image, c. 8000x13000 pix with layers 32 bit and initially about 6 GB in memory. Two minutes example: https://sendvid.com/vu577ftk (This is as good as watching paint dry but in real time.)

That is a linux appimage. Maybe a Windows thing ?