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New 2015 MacBook Air i7 scoring low CPU rating

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I recently purchased a new, 2015 MacBook Air 2.2 GHz dual-core i7.
I have upgraded from my 2008 MacBook Pro 2.4 GHz Core 2 Duo.

It was my understanding that I would see in increase in performance. I work in music production and audio, but I work efficiently, so didn't feel a MacBook Pro was necessary as any step up would be enough. However, I am having some issues running the same tasks and projects. The MacBook Air i7 is not performing as well as my old 2008 MacBook Pro in some cases with the same settings inside the software I use.

My benchmark tells me that the CPU is in the 9th percentile. That seems low.

The scores for CPU are:
CPU Tests (Score: 422)

- Floating Point Operations/Second: 135330976
- Integer Operations/Second: 250505072
- Hashes Computed/Second: 1065336
What should I be seeing? Does this mean I may simply have an underperforming CPU?
I have an option to exchange either as a defective product (and I do wish to stay with the MacBook Air), or I can exchange to upgrade (which I'm considering).
But the option to exchange to upgrade might not be there in the future if I encounter the same problem with the next MacBook Air. So I'm a bit anxious about the decision.
Some folks have quoted issues with Sierra in regards to the software I use. But many of those issues are in regards to graphics handling (with graphics card switching awhich doesn't apply to the MacBook Air (it's not an option presented). Still might be something else at play? But I felt the benchmark score might also be pointing at something being wrong?
Any advice would be greatly appreciated! Thanks so much!

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