[question]:How do I obtain and limit the resources used by WASM?

[springrain]

How do I obtain and limit the resources used by WASM?
Mainly CPU, memory, disk IO, execution time,. like blockchain contract gas

[ncruces]

You create your runtime with wazero.NewRuntimeWithConfig, and use the following to limit:

• memory:
  RuntimeConfig.WithMemoryLimitPages
• execution time:
  RuntimeConfig.WithCloseOnContextDone (and then use context timeouts/cancellation).

Those are the available ones.

[springrain]

Does Wazero have any plans to enhance resource-related features?
wasmer and WasmEdge set a gas value for each instruction, and the host function can set the gas value itself to calculate the total gas used to execute wasm. Wazero doesn't know if there's a plan?
Getting and limit gas is important for cloud functions and faas.

[codefromthecrypt]

@springrain this is a duplicate of #422. There are notes throughout that issue and also some technical notes in #1108 as to why we closed it.

You can subscribe to #422 in case something changes which allows us to re-visit the topic with new information besides demand. For now, what @ncruces mentioned is the current workaround and agree it is not the same as emulating a fuel concept.