Arbitrum Stylus Smart Contract Expansion: Five Throughput Myths Versus Facts

Stylus contracts execute WASM code that runs natively on Arbitrum nodes, bypassing the EVM interpreter entirely. This architectural shift delivers specific performance metrics that contradict common assumptions about Layer 2 scaling. The network processed 478 million transactions in the first half of 2026, with ecosystem GDP reaching $206 million for that period. These figures confirm that high throughput is no longer a theoretical promise but a measured reality for developers deploying Rust or C++ programs.

Computational Efficiency and Gas Costs

Myth one claims that WASM execution offers only marginal speed improvements over Solidity. The data refutes this easily. Computation is over 10x improved, while memory allocation costs are 100 to 500x lower than in Solidity. RedStone’s oracle implementation provides concrete proof of this efficiency. Their benchmarks show a 34.3% reduction in base computational overhead, dropping from 35k to 23k units. Per-feed computation also halved, falling from 16k to 8k units. This direct byte access eliminates the costly stack-based data handling that plagues EVM oracles. Developers can now process dozens of feeds per transaction without hitting the standard 256-bit limitation.

Myth two suggests that switching to WASM requires rewriting entire codebases. In practice, existing libraries often deploy with minimal modifications. A C implementation of secp256r1 ran on-chain without any changes to the source code. Similarly, Wakeup Labs developed a tool to compile AssemblyScript into WebAssembly, making Stylus accessible to JavaScript developers. You do not need to abandon your current toolchain; you just add a new compiler target. The main entry point must be a function called user_entrypoint that receives an i32 length and returns an i32 status code.

Developer Experience and Operational Friction

Myth three asserts that the developer experience is smooth and identical to standard Solidity workflows. This is clearly false. LimeChain’s research highlights significant friction in the development lifecycle. The lack of a single "build" command forces developers to use native cargo for compilation and a separate CLI for deployment. Constructor support was initially absent, forcing ERC20 implementations to use generics that increased code complexity. Projects requiring multiple entrypoints faced additional setup hurdles that single-entry tools did not handle well.

Myth four implies that all WASM languages perform equally. Performance varies by language because some generate more efficient WASM binaries than others. Rust and C++ generally outperform other options in raw execution speed. However, even optimized crates like ed25519-compact require explicit configuration to fit within size limits. Myth five suggests that gas costs remain static regardless of workload. Ink charging is dynamic; each WASM opcode has a cost measured in ink, which is thousands of times smaller than Ethereum gas. For simple operations like ADD, the EVM touches memory multiple times, while WASM executes it natively in a single step. This difference compounds across complex computations, making heavy workloads significantly cheaper on Stylus.

The Stylus Sprint program received 147 submissions requesting approximately 32M ARB, far exceeding the initial 5M budget. Only 17 projects were selected, including tools for debugging, fuzzing, and migration. Enclave had to pivot its scope after finding FHE computations too large for the VM, proving that hardware limits still apply. Will the next SDK version resolve these tooling gaps before they stifle adoption?