function loadavg
Usage in Deno
```typescript import { loadavg } from "node:node__os.d.ts"; ```
loadavg(): number[]
Returns an array containing the 1, 5, and 15 minute load averages.
The load average is a measure of system activity calculated by the operating
system and expressed as a fractional number.
The load average is a Unix-specific concept. On Windows, the return value is
always `[0, 0, 0]`.
number[]