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ICP Developer Docs

Large Wasm Modules

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Deploy canisters with Wasm modules larger than the 2MB limit. Cover the Wasm chunk store for splitting large modules, gzip compression for reducing size, the ic-wasm tool for stripping and optimizing, and Wasm64 support for 64-bit memory. Explain when and why you might need large modules (ML models, complex business logic). Include a section on WebAssembly SIMD — 200+ vector instructions for parallel computation that accelerate AI/ML inference, image processing, cryptographic operations, and other math-heavy workloads. SIMD is available on every ICP node.

  • Portal: building-apps/developing-canisters/compile.mdx (large Wasm section)
  • Examples: backend_wasm64 (Rust)
  • icp-cli: —wasm-chunk-store flag
  • guides/canister-management/optimization — reducing Wasm size to avoid this entirely
  • reference/execution-errors — Wasm size errors
  • guides/canister-management/lifecycle — deployment with chunk store