[Bitcoin-development] Version bits proposal

Patrick Strateman patrick.strateman at gmail.com
Thu May 28 01:05:08 UTC 2015


There is absolutely no reason to do this.

Any reasonable micro-controller can build merkle tree roots
significantly faster than is necessary.

1 Th/s walks the nonce range once every 4.3ms.

The largest valid merkle trees are 14 nodes high.

That translates to 28 SHA256 ops per 4.3ms or 6511 SHA256 ops/second.

For reference an RPi 1 model B does 2451050 SHA256 ops/second.

On 05/27/2015 03:52 PM, Sergio Lerner wrote:
> I like the idea but I think we should leave at least 16 bits of the
> version fixed as an extra-nonce.
> If we don't then miners may use them as a nonce anyway, and mess with
> the soft-fork voting system.
> My original proposal was this: https://github.com/bitcoin/bitcoin/pull/5102
>
> Best regards
>
>
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