performance impact of various compression schemes on a zvol

What's the perfomance penalty on zvols of compression?
The impact on the host?

I've searched and cannot find figures. I'm not looking for exact numbers,
more rather would zstd-9 or zstd-6 be better, more suited to zvol 
(compression and speed) than lz4, possibly because it's more recent? 
Or would no compression at all be 'best'?

In the example, cpu is E5-2690, ram is 512GB, disks are ssd
(these register as nda0 and nda1, as a zpool striped config)
The zvols are bhyve instances. The host is recent -current.
TIA for any tips. 
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