Re: [RFC PATCH] Btrfs: add sha256 checksum option

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Alex Elsayed wrote:

> So CityHash is - at best - half as fast as SHA1 with acceleration.
> 
> In fact, on the Apple A7, it would likely be slower than _software_ SHA-1.

Argh, ignore this. The CityHash readme is in bytes/cycle, which I missed on 
first readthrough (why on earth they are  not using either MB/s for rate, or 
cycles/byte, eludes  me completely.)

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