Hi guys, anyone experiencing colorfast to be slow during playback in Premiere Pro?
Also, the rendering takes a while with 5 minute clips, it would take about more than an hour to render them with colorfast.

Is this normal or is there any trick to this?

I use it on new Imac, 16gb, nvidia

While we have not seen abnormally slow times, it does affect every pixel of every frame which will take time. How much time will depend on many factors including the video resolution, speed of the computer, the GPU, etc..