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---
icon: simple/fastapi
---
Many `FastAPI` users use `HTTPX` as a modern and very fast HTTP client, which also supports **async/await** syntax like FastAPI does.
Here is an example of how `HTTPX` can be used in `FastAPI`.
``` python
from fastapi import FastAPI
from httpx import AsyncClient
from httpx import Limits
app = FastAPI()
client = AsyncClient(limits=Limits(max_connections=1000))
@app.get("/")
async def main():
response = await client.get('https://www.encode.io')
return response.status_code
```
Now let's do some load testing using the popular load testing tool [Locust](https://locust.io/).
[Here are](https://raw.githubusercontent.com/karpetrosyan/hishel/master/docs/static/fastapi_without_cache.png) the test results:
<a href="https://raw.githubusercontent.com/karpetrosyan/hishel/master/docs/static/fastapi_without_cache.png">
<img src="https://raw.githubusercontent.com/karpetrosyan/hishel/master/docs/static/fastapi_without_cache.png" alt="pypi">
</a>
Despite the fact that we use **async/await**, we got only **±70 RPS**.
Now let's change the `httpx.AsyncClient` to `hishel.AsyncCacheClient` and do the same tests again.
``` python hl_lines="2 6"
from fastapi import FastAPI
from hishel import AsyncCacheClient
from httpx import Limits
app = FastAPI()
client = AsyncCacheClient(limits=Limits(max_connections=1000))
@app.get("/")
async def main():
response = await client.get('https://www.encode.io')
return response.status_code
```
[Here are](https://raw.githubusercontent.com/karpetrosyan/hishel/master/docs/static/fastapi_with_cache.png) the test results:
<a href="https://raw.githubusercontent.com/karpetrosyan/hishel/master/docs/static/fastapi_with_cache.png">
<img src="https://raw.githubusercontent.com/karpetrosyan/hishel/master/docs/static/fastapi_with_cache.png" alt="pypi">
</a>
Now we have more than **365+ RPS** using the power of HTTP caching.
|
