Hi Jose,

Jets are briefly discussed in section 3.4 of https://blockstream.com/simplicity.pdf

The idea is that we can recognize some set of popular Simplicity expressions, and when the Simplicity interpreter encounters one of these expressions it can skip over the Simplicity interpreter and instead directly evaluate the function using specialized C or assembly code.

For example, when the Simplicity interpreter encounters the Simplicity expression for ECDSA verification, it might directly call into libsecp rather than continuing the ECDSA verification using interpreted Simplicity.

HTH.

On Nov 2, 2017 18:35, "JOSE FEMENIAS CAÑUELO via bitcoin-dev" <bitcoin-dev@lists.linuxfoundation.org> wrote:

Hi,

I am trying to follow this Simplicity proposal and I am seeing all over references to ‘jets’, but I haven’t been able to find any good reference to it.
Can anyone give me a brief explanation and or a link pointing to this feature?
Thanks

On 31 Oct 2017, at 22:01, bitcoin-dev-request@lists.linuxfoundation.org wrote:

The plan is that discounted jets will be explicitly labeled as jets in the
commitment. If you can provide a Merkle path from the root to a node that
is an explicit jet, but that jet isn't among the finite number of known
discounted jets,

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