> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vpod.sh/llms.txt
> Use this file to discover all available pages before exploring further.

# Limitations

> Current constraints to be aware of.

* **Emulation overhead** — No hardware acceleration in the WASM component. CPU-intensive workloads may run slower than native.
* **No GPU access** — CUDA, Metal, and hardware ML accelerators are not yet available. Support may be added in the future with wasi-nn.
* **Env vars don't cross between shell and Python** — `sandbox.commands.run("export FOO=bar")` is not visible in `sandbox.code.run(...)`. Use the filesystem to share data between the two.