# GC and Exceptions in Wasmtime

> **Key Architectural Takeaway:** The Wasm GC and exceptions proposals are both enabled by default in today’s Wasmtime 47 release ! We are excited to help bring more languages to WebAssembly and everywhere that Wasmtime runs.

**Published:** 2026-07-20T00:00:00+00:00  
**Source:** Bytecode Alliance WebAssembly & Wasmtime  
**Category:** software-engineering  
**Canonical URL:** https://fosswire.org/news/gc-and-exceptions-in-wasmtime.html  

## Executive Summary
The Wasm GC and exceptions proposals are both enabled by default in today’s Wasmtime 47 release ! We are excited to help bring more languages to WebAssembly and everywhere that Wasmtime runs. Getting to this point involved large Wasmtime changes and represents the culmination of years of engineering effort. Wasmtime Wasmtime is a WebAssembly runtime that is fast , safe , and portable .

## Architectural & Systems Analysis
From an infrastructure engineering, cloud-native scale, and hyperscale governance standpoint:

- **Hyperscale Provenance:** Open-sourcing internal frameworks subjects proprietary systems to rigorous public analysis.
- **De-facto Standard Cohesion:** Publishing enterprise tooling establishes interoperable specifications across distributed execution.
- **Vendor Decoupling:** Platform engineers can inspect underlying telemetry and memory layouts without black-box vendor lock-in.

## Impact on the Open Ecosystem
Bridges enterprise engineering scale with independent, reproducible open-source software stacks.