zfs on ssd

Hello list,

I'd like to zpool 2x different size ssds into a single (non-redundant) 
pool. One is nearly 2Tb the other is nearly 4Tb.

Will this work without performance penalty? I'm hoping that,
because it'll be a non-redundant stripe, it'd work as expected
without issue. The contest here is -current.

Right now each ssd is its own zpool

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