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# `Promise.limit` _(ext/promise/limit)_
Helps to limit concurrency of asynchronous operations.
```javascript
const limit = require("ext/promise/limit").bind(Promise);
const limittedAsyncFunction = limit(2, asyncFunction);
imittedAsyncFunction(); // Async operation started
imittedAsyncFunction(); // Async operation started
imittedAsyncFunction(); // On hold until one of previously started finalizes
```