A place for talking about the Ethereum Virtual Machine on Farcaster.

Re-introducing EVM Diff

EVM Diff is the easiest way to diff EVM-compatible chains in a friendly format, now with automated discovery of chain differences, making it much more scalable.

There's two ways to diff:
- Two chains side-by-side
- All chain in a caniuse.com-like table

Try it out at http://evmdiff.com

The side-by-side view already existed. It's been updated with a better UX, and the ability to view the raw JSON files that are behind the diff.

Security at Optimism. Formerly built Umbra and more at ScopeLift

The new caniuse.com-like view lets you see at a glance how chains compare to one another for a given feature.

Currently supported features include opcodes, precompiles, deployed contracts, and chain metadata. More features are comings soon.

To demonstrate the scalability of http://evmdiff.com, 9 chains are already supported:

- Ethereum Mainnet
- OP Mainnet
- Polygon Mainnet
- Base
- Mode
- Arbitrum One
- Avalanche C-Chain
- Linea
- Scroll

Data is re-fetched hourly to ensure everything is fresh and up to date.

Everything here is now live at http://evmdiff.com

It's all open-source, so check out the repo to contribute, or open issues with feature requests, bugs, or new data you'd like to see included:

Everything here is now live at http://evmdiff.com

It's all open-source, so check out the repo to contribute, or open issues with feature requests, bugs, or new data you'd like to see included: https://github.com/mds1/evm-diff

Gas is tricky to generalize. There are some thoughts on gas data in https://github.com/mds1/evm-diff/issues/31, but would appreciate a comment there with any thoughts or ideas you might have!

Nice!
What about gas estimation models, most of the l2s differ when it comes to gas estimation
We have an auction model, eip1559 on top of this some also adds 2D pricing by using dynamic estimate gas (arbitrum)

It's hard to get entirely accurate because opcode gas pricing gets complex since they are a function of things like cold/warm slots and memory usage. Some more info on the plans in https://github.com/mds1/evm-diff/issues/67 and

It's hard to get entirely accurate because opcode gas pricing gets complex since they are a function of things like cold/warm slots and memory usage. Some more info on the plans in https://github.com/mds1/evm-diff/issues/67 and https://github.com/mds1/evm-diff/issues/31

It would be great that in addition to supported opcodes, we get the cost of each one. In ZkSync for example, there are multiple differences. 
Good work ✅