http://imagej.273.s1.nabble.com/Severe-perfomance-drop-after-last-Fiji-update-tp5013826p5013832.html
> Hi,
>
> today after some time I finally decided to upgrade Fiji to ImageJ 1.50a. I
> must say that I instantaneously regret it. Working with nd2 Hyperstacks
> became much much slower. For very small one frame three channel nd2 files
> which are only 5Mb in size it now takes roughly 1-2 seconds to switch
> between channels, even when in not-virtual-stack mode! And also even the
> drawing of simple rectangular Rois is very laggy right now. Working with
> tifs is also affected, although this new laggyness isn't that strong in
> that
> case. But also here channel switching takes around 1second and the image
> only slowly appears from top to bottom.
>
> I am using Mac OS 10.10.
>
> How can I downgrade Fiji again?
>
> Best,
> Gregor
>
>
>
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