I have had Hitfilm since Hitfilm 2 express was announced...
Back then I used my mums MacBook air, and I didn't expect good performance, but surprisingly it was quite decent. Video playback was smooth and effects like lightning and glow would still run smoothly in playback. Then I got a top notch performance laptop god of 2014 from Asus (Currently has a much higher benchmark on 3dmark than the €3,000 Surface pro)
i7 4700HQ - Geforce GTX 850m 4gb - 16gb ram - 1080p LCD display - Standard windows 10
When I got this, I installed Hitfilm 2 express and used it. Video playback was smooth and fine. 2 express didn't have enough effects to take full advantage of my laptops full potential, or I was just too new at VFX to put it to the test. Then Hitfilm 3 pro came along. I bought it... and performance died. I felt slower than my mums MacBook air. And the problem continues with pro 4. Video playback is laggy and stutters and 2d motion graphics playback is (excuse the language) shit.
Other things like 3D effects being laggy I can understand. But small things seem to really be hated by my laptop. And this is all rendering at 1080p. I have tried the after effects trial (pretty buggy) and 2D motion graphics runs like a dream (note: rendering at QHD 2560x1440).
I hope Hitfilm take note of this. I am not hating on Hitfilm but simply want them to do something about this. It is just... slightly inconvenient.
But I may just be wrong and that this is to do with Nvidia's terrible driver support. If anyone knows a way to fix this manually, please help.