One of the challenges for any L2 is to reflect accurately the cost for each opcode in zk-resources.
Ethereum L1 reflects the resource cost in term of GAS but lately it has been proposed chnages in opcode GAS cost to fit the zk-world to make Ethreum L1 more aligned to L2 or even with enshrined zk-rollups.
In this talk, I will explain the worst performance opcodes when comparing its GAS cost Vs zk-resources cost in Polygon zkEVM in typical transactions (erc20 trannsfers, swaps, ...)

Stage 3

I started working on self sovereign identity in my first contact with web3/Ethereum back in 2018. Concretely in Iden3. Started kind of a spin off to build the rollupPoC, a proof-of-concept zkRollup (only payments) using zk-language circom. That was the seed for the Hermez network where I got the role of protocol engineer. Hermez evolution was Polygon zkEVM, where I was the team lead in the protocol team where we code the EVM in a new zk language, zkASM.

Carlos Matallana

I'm a smart contract developer.
I'm always eager to learn and try new things, and love this ecosystem plenty of very smart and nice people that has so many cool ideas 
I begin almost 5 years ago in Iden3, which then will be renamed to Hermez and finally Polygon zkEVM.
In that journey i start doing smart contracts on Hermez and end up in charge of the zkEVM/CDKs smart contracts ( which they will be the AggLayer contracts too)