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Add better explanation for background tasks

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Yerassyl Zhanymkanov
2022-08-28 14:05:17 +06:00
parent 4a0e97201b
commit 0d12e708d3
1 changed files with 4 additions and 4 deletions
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@@ -596,10 +596,10 @@ async def test_create_post(client: TestClient):
``` ```
Unless you have sync db connections (excuse me?) or aren't planning to write integration tests. Unless you have sync db connections (excuse me?) or aren't planning to write integration tests.
### 15. BackgroundTasks > asyncio.create_task ### 15. BackgroundTasks > asyncio.create_task
BackgroundTasks can [effectively run](https://github.com/encode/starlette/blob/31164e346b9bd1ce17d968e1301c3bb2c23bb418/starlette/background.py#L25) both blocking and non-blocking I/O operations. BackgroundTasks can [effectively run](https://github.com/encode/starlette/blob/31164e346b9bd1ce17d968e1301c3bb2c23bb418/starlette/background.py#L25)
Since the API for sending these tasks will be the same (i.e. coroutines are not explicitly awaited), both blocking and non-blocking I/O operations the same way it handles routes (`sync` functions are run in a threadpool, while `async` ones are awaited later)
it's preferable to use starlette's background tasks. - Don't lie to the worker and don't mark blocking I/O operations as `async`
Don't use it for CPU intensive tasks. - Don't use it for heavy CPU intensive tasks.
```python ```python
from fastapi import BackgroundTasks from fastapi import BackgroundTasks
from pydantic import UUID4 from pydantic import UUID4