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docs: fix grammatical error in delegation to sync methods (#28165)

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### **Description**  
Fixed a grammatical error in the documentation section about the
delegation to synchronous methods to improve readability and clarity.

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No associated issue.

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---------

Co-authored-by: ccurme <chester.curme@gmail.com>
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Talha Munir 2024-11-18 21:27:30 +05:00 committed by GitHub
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docs/docs/concepts/async.mdx
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@ -46,7 +46,7 @@ Most popular LangChain integrations implement asynchronous support of their APIs
When an asynchronous implementation is not available, LangChain tries to provide a default implementation, even if it incurs When an asynchronous implementation is not available, LangChain tries to provide a default implementation, even if it incurs
a **slight** overhead. a **slight** overhead.
By default, LangChain will delegate the execution of a unimplemented asynchronous methods to the synchronous counterparts. LangChain almost always assumes that the synchronous method should be treated as a blocking operation and should be run in a separate thread. By default, LangChain will delegate the execution of unimplemented asynchronous methods to the synchronous counterparts. LangChain almost always assumes that the synchronous method should be treated as a blocking operation and should be run in a separate thread.
This is done using [asyncio.loop.run_in_executor](https://docs.python.org/3/library/asyncio-eventloop.html#asyncio.loop.run_in_executor) functionality provided by the `asyncio` library. LangChain uses the default executor provided by the `asyncio` library, which lazily initializes a thread pool executor with a default number of threads that is reused in the given event loop. While this strategy incurs a slight overhead due to context switching between threads, it guarantees that every asynchronous method has a default implementation that works out of the box. This is done using [asyncio.loop.run_in_executor](https://docs.python.org/3/library/asyncio-eventloop.html#asyncio.loop.run_in_executor) functionality provided by the `asyncio` library. LangChain uses the default executor provided by the `asyncio` library, which lazily initializes a thread pool executor with a default number of threads that is reused in the given event loop. While this strategy incurs a slight overhead due to context switching between threads, it guarantees that every asynchronous method has a default implementation that works out of the box.
## Performance ## Performance