> For the complete documentation index, see [llms.txt](https://jolzee.gitbook.io/leopard/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://jolzee.gitbook.io/leopard/components/expensive-operations.md).

# Expensive Operations

## Instructions

Add an output parameter of `command = delay` to any output node. Leopard will then show the "thinking" graphic until it next receives a response from Teneo. When the graphic is shown Teneo automatically sends back an empty input to Teneo with a request parameter of `command=continue` .  You can then begin your expensive operation and return the response as per usual. 

<div align="left"><img src="/files/-LjbLRUSBJ-6diZnoVZo" alt=""></div>

Remember you can retrieve request parameters in Teneo in Pre-Processing.

{% code title="Pre-Processing script grabs command parameter and sets it as a global variable" %}

```groovy
if (engineEnvironment.getParameter("command")) {
	command = engineEnvironment.getParameter("command")
} else {
	command = ""
}
```

{% endcode %}

### Screenshots

<div align="left"><img src="/files/-LjbInDo_YiOKG08DhXU" alt=""></div>

### Output Parameter

```
command = delay
```

##