Is there a way to inspect the pending queue size?

Question

RepoPilot · Accepted Answer

Yes, you can inspect the pending queue size using the `pendingCount` property. This property returns the number of promises that are waiting to run (i.e., their internal `fn` has not been called yet).

According to the type definitions in [index.d.ts:L8-L10], `pendingCount` is defined as:

```
/**
The number of promises that are waiting to run (i.e. their internal `fn` was not called yet).
*/
readonly pendingCount: number;
```

This is useful for monitoring queue status. For example, in the recipes documentation [recipes.md:L191-L214], there's a progress reporting example that uses `pendingCount` along with `activeCount` to track the state of the limiter:

```js
const progressInterval = setInterval(() => {
	console.log(`Running: ${limit.activeCount}, pending: ${limit.pendingCount}`);
}, 250);
```

This allows you to see both how many promises are currently running and how many are queued up waiting to execute.

FOLLOW_UPS:
- How does activeCount differ from pendingCount?
- Can you modify the concurrency limit dynamically?
- What happens when clearQueue() is called?