Vitalik Buterin Proposes Radical Ethereum Overhaul To Cut Proving Costs

Imagine waking up to find that one of the biggest bottlenecks in Ethereum’s push toward mass adoption might finally be getting tackled at its roots. That’s exactly what happened recently when Vitalik Buterin laid out a vision that’s both ambitious and deeply technical. In my view, this could be one of the most significant execution-layer proposals we’ve seen in years.

Ethereum’s Proving Puzzle: Why Change Is Needed Now

Ethereum has come a long way since its early days. But as zero-knowledge proofs become central to scaling, the current architecture shows its age. Proving costs remain stubbornly high, and according to recent discussions, over 80 percent of those costs come from just two areas: the state tree and the virtual machine. It’s like trying to run a modern race car on an old dirt road – you can do it, but it’s inefficient and frustrating.

I’ve followed Ethereum’s evolution closely, and it’s clear that band-aid fixes can only take us so far. The real wins come from rethinking fundamentals. That’s where this latest proposal shines – it’s not about tweaking; it’s about redesigning for the ZK era.

The Near-Term Fix: EIP-7864 and the Binary State Tree

At the heart of the short-term plan is EIP-7864, which suggests replacing the existing hexary Merkle Patricia Tree with a cleaner, unified binary tree. Why does this matter? The current setup was designed for a different world – one where proving wasn’t the primary concern. Binary trees, by contrast, are much more friendly to modern provers.

One immediate benefit is dramatically shorter Merkle branches. We’re talking roughly four times shorter in many cases. That alone reduces bandwidth needs for verification and makes lightweight clients far more practical. But it doesn’t stop there.

• Switching the hash function to something like BLAKE3 could give another 3x boost in proving speed.
• Future options like Poseidon variants might push that to 100x – though security audits would come first, of course.
• Page-based storage groups nearby slots, potentially saving thousands of gas for contracts that touch initial storage.

I’ve always thought gas costs for storage access are one of those hidden killers in DeFi transactions. This change could make a real difference for everyday users without them even noticing the upgrade under the hood.

The state tree and VM together drive over 80% of proving costs – fix one without the other and you leave money on the table.

– Ethereum researcher insight

Another nice side effect is simpler auditing and more predictable performance. No more wild variance in proof depths depending on contract size. It’s the kind of boring-but-important improvement that quietly makes the whole ecosystem stronger.

Looking Further Ahead: Replacing the EVM with RISC-V

Now, this is where things get really interesting – and controversial. The longer-term idea is to phase out the EVM entirely in favor of something like a RISC-V based virtual machine. I know, it sounds radical. The EVM has been the heart of Ethereum smart contracts for over a decade. But hear me out.

The EVM wasn’t built with ZK proving in mind. It’s quirky, has accumulated precompiles as workarounds, and proving it efficiently is painful. RISC-V, on the other hand, is an open standard that’s already widely used in hardware and software. Many ZK provers are built around it natively.

1. Raw execution becomes much faster, reducing or eliminating the need for precompiles.
2. Proving aligns perfectly with existing ZK toolchains – no more translation layers.
3. Client-side ZK proofs become feasible for privacy features we can only dream of today.
4. The interpreter itself is simple – hundreds of lines instead of thousands.

Perhaps the most compelling part is the migration plan. It’s staged carefully: start with precompiles in the new VM, then allow new contracts, and finally reimplement the EVM as a contract on top for backward compatibility. Gas costs might change, but with scaling gains elsewhere, it should be a net win.

Of course, this isn’t consensus yet. It’s a vision that will gain traction as the state tree work matures. In my experience following these debates, big changes like this take time to build support – but when they do, they redefine what’s possible.

Let’s dig deeper into why these two pieces – state tree and VM – are so intertwined. Proving a block involves verifying state transitions, which means hashing the tree and executing code. If either part is inefficient, the whole process suffers. Addressing both creates synergy that’s hard to achieve otherwise.

Potential Impacts on Developers and Users

For developers, this could mean simpler mental models. Uniform tree depth reduces surprises in gas estimation. Page grouping rewards thoughtful storage layouts – something savvy teams already do, but now with bigger payoffs.

Users might see lower fees in ZK rollups or faster finality assumptions. Privacy applications could flourish with client-side proving. And long-term, Ethereum becomes more competitive against chains designed from scratch for ZK.

Is there risk? Sure. Big changes carry migration headaches, potential bugs, and community debates. But Ethereum’s track record of careful upgrades gives reason for optimism.

Wrapping Up: A Path to a More Efficient Ethereum

These proposals aren’t just technical tweaks – they’re a declaration that Ethereum is ready to evolve its core for the next phase. By tackling the state tree now and eyeing a VM shift later, the network positions itself for a proving-efficient future. It’s exciting to think about what becomes possible when those 80% bottlenecks shrink dramatically.

Whether you’re a developer building on Ethereum, an investor watching the roadmap, or just someone curious about blockchain’s direction, this is worth keeping an eye on. Change like this doesn’t happen overnight, but when it does, it reshapes everything. What do you think – is RISC-V the right long-term bet? I’d love to hear your take in the comments.