Supercharge Your Java Apps with WebAssembly
summary
A Vert.x Java HTTP service called “cracker” loads WebAssembly (Wasm) plugins compiled from Rust, TinyGo, Go and Zig using the Extism SDK for Java, runs them on Wasmtime/Wasmer/Wazero runtimes, and hot-swaps plugins by changing environment variables. The talk demonstrates a working Java-to-Wasm demo, a Kubernetes deployment with a ~130 MB runtime image, and microbenchmarks (Fibonacci in nanoseconds) showing Rust and TinyGo outperform Java for compute-bound tasks but not for I/O-heavy workloads.
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chapters (10)
- 0:00Introduction
- 2:09Why WebAssembly in Java
- 6:11Technical challenges and solutions
- 10:47Simplifying frameworks
- 13:13Live demo
- 18:37Performance and use cases
- 21:51WebAssembly nano-services
- 23:39Kubernetes deployment
- 27:40WebAssembly beyond browser
- 28:45Summary
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