.. _config_wasm_runtime: Wasm runtime ============ The following runtimes are supported by Envoy: .. csv-table:: :header: Name, Description :widths: 1, 2 envoy.wasm.runtime.v8, "`V8 `_-based runtime" envoy.wasm.runtime.wamr, "`WAMR `_ runtime" envoy.wasm.runtime.wasmtime, "`Wasmtime `_ runtime" envoy.wasm.runtime.wavm, "`WAVM `_ runtime" envoy.wasm.runtime.null, "Compiled modules linked into Envoy" WAMR(WASM-Micro-Runtime), Wasmtime and WAVM runtimes are not included in Envoy release image by default. Wasm runtime emits the following statistics: .. csv-table:: :header: Name, Type, Description :widths: 1, 1, 2 wasm..created, Counter, Total number of execution instances created wasm..active, Gauge, Number of active execution instances