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There's also enormous time dilation, they would appear to be moving very very slowly from our POV.

It would be magical if both those phenomenon exactly counter each other (I have not run any numbers, but my instinct tells me time dilation will win out).

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I think a neutron star would have time dilation below 2x. Would be interesting at our time scale, but on the order of magnitude we're discussing of the increased chemical speed i think it would just be noise.

A neutron star is right on the edge of being a black hole, which has infinite time dilation. A neutron star should have very very high time dilation.

There is a big difference between infinite and very high gravity. Neutron stars have only about 50% time dilation on the surface, as the surface is at about 50% their Schwarzschild radius.

> the surface is at about 50% their Schwarzschild radius

Don’t you mean 100%? From what I can tell, the radius of a neutron star is about twice its Schwarzschild radius.

https://www.aanda.org/articles/aa/pdf/2001/46/aah3021.pdf

So...50%?

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