# Week 13 Update 13.1 During this week I completed all the benchmarks I was planning to do. I found some errors in the previous benchmark I coded using [`criterion`](https://crates.io/crates/criterion) and I spent time this week correcting those errors and running the new benchmarks. All benchmark results can be accessed through the github repository https://github.com/mdvillagra/poseidon-benchmarks. The main comparisons are shown in the plot below. ![](https://hackmd.io/_uploads/SJaDzs5-T.png) In this graphic, we have tested inputs of sizes 256, 512, 768 and 1024 bits. [Risc0](https://www.risczero.com/) have two implementations, one with the BLS12-381 scalar field of 255 bits and another with the Babybear field of 31 bits. Right now, the repository is in a state where it is very easy to add any other Poseidon instantiation as a submodule and then prepare the benchmark for it and just run it. All stats are generated using [`criterion`](https://crates.io/crates/criterion). Independent of [EIP-5988](https://eips.ethereum.org/EIPS/eip-5988), this repository is useful by itself for further research into the Poseidon hash function. From now on, I will work on finishing a Poseidon implementation in Solidity and writing a technical report in academic style. This will also include a proposal of gas costs for a potential precompile of Poseidon.
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Marcos Villagra
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Final Dev Update

Precompile contracts

11/6/2023
Week 14 Update 14.1

This is the first week since the start of the program that I slowed down a bit. I spent the week rereading the yellow paper to make a proposal of the gas cost of a potential Poseidon precompile.

10/23/2023
Week 12 Update 12.1

This week I got prelimanry results on the benchmarks of the Poseidon hash function. These results can be accessed here:

10/9/2023
Week 11 Update 11.1

During this week I spend most of my time trying to make the Cryptoexperts Poseidon permutation work. Let us recall that the Cryptoexperts instantiation of Poseidon is written in C language. Hence, this required to make a C interface from Rust.

10/2/2023
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