exporting faster in final cut pro

So many variables: the duration of the video, the frame size, the contents, and the export settings all play a role.

Depending on the mac you have, some exports may benefit from dedicated hardware, whereas others don't.

Can you give some specific examples of ones that take a long time vs others that don't, considering all the variables mentioned?

Also exactly what computer and OS this is.

I think that's going to all in software with no hardware support. It's going to be slow. Later Macs have hardware codecs of the system board that make processing much faster.

What do you mean by "slow"?

How long does that 51 minute video take to export?

It's going to be at least 30 minutes. Maybe an hour.

What plugins are you using?

How many titles are in the timeline?

All that matters.