Is there a way to inspect the pending queue size?

Question

RepoPilot · Accepted Answer

Yes, there is. You can inspect the pending queue size using the `limit.pendingCount` property.

According to the API documentation [index.d.ts:L8-L11], `pendingCount` is a read-only property that returns "The number of promises that are waiting to run (i.e. their internal `fn` was not called yet)."

Here's a practical example from the test suite [test.js:L187-L189]:

```javascript
const limit = pLimit(1);

Array.from({length: 1}, () => limit(() => delay(1000)));
Array.from({length: 3}, () => limit(() => delay(1000)));

await Promise.resolve();
t.is(limit.pendingCount, 3);  // Inspect the pending queue size
```

This allows you to see how many tasks are queued up and waiting to execute. Additionally, you can also inspect `limit.activeCount` [index.d.ts:L3-L5] to see how many promises are currently running.

FOLLOW_UPS:
- How do I clear the pending queue?
- What's the difference between activeCount and pendingCount?
- Can I modify the concurrency limit dynamically?