Using Request.Sessions for faster and less open connections #923

structwafel · 2024-02-02T14:03:39Z

Pull Request

Related issue

Fixes #<issue_number>

What does this PR do?

Changes all requests.get/etc methods to session.get/etc, in order to not create new connections for each request

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structwafel · 2024-02-02T14:04:20Z

Do need some help as to why this test doesn't pass:

==================================================================== short test summary info =====================================================================
FAILED tests/errors/test_timeout_error_meilisearch.py::test_client_timeout_error - Failed: DID NOT RAISE <class 'meilisearch.errors.MeilisearchTimeoutError'>
=========================================================== 1 failed, 243 passed, 1 xfailed in 33.49s ============================================================

sanders41 · 2024-02-02T14:40:01Z

Do need some help as to why this test doesn't pass:

It fails because the test patches requests.get, but you changed the code to use session.get so the patch isn't running.

I understand why in theory this could be faster in the right situation, but did you do any benchmarking? In my extreamly quick and crude benchmark there was no improvement.

structwafel · 2024-02-02T15:09:49Z

Do need some help as to why this test doesn't pass:

It fails because the test patches requests.get, but you changed the code to use session.get so the patch isn't running.

I understand why in theory this could be faster in the right situation, but did you do any benchmarking. In my extreamly quick and crude benchmark there was no improvement.

Haven't done any benchmarks, other than knowing that requests.get() needs to open a new TCP connection and session.get() can re-use the same connection.

The bigger "issue" which arose in my setup is Connection timeout's due to the quantity of connections were being made to my Meilisearch Server, probably nginx settings. But I also got There is no reason to not reuse a TCP connection when possible.
Other SDK's are using the same logic, by sharing the client/Session between meilisearch.Client and meilisearch.Index:
https://github.com/meilisearch/meilisearch-go/blob/main/index.go#L82-L88

sanders41

I don't have an issue with it in principal. It's just that it is a change for the sake of a change if we can't show it makes any difference. @curquiza I'll let you make the call here, I don't have a preference either way.

If we do implement it I think there are a few changes we should make.

sanders41 · 2024-02-02T15:33:52Z

meilisearch/index.py

@@ -31,6 +31,7 @@ def __init__(
        primary_key: Optional[str] = None,
        created_at: Optional[Union[datetime, str]] = None,
        updated_at: Optional[Union[datetime, str]] = None,
+        http: Optional[HttpRequests] = None,


Since HttpRequests comes from a private module it's not great to pass it around like this. I think it would be better to pass around the session because of this.

session also needs to be added to the docstring

Suggested change

http: Optional[HttpRequests] = None,

session: Optional[Session] = None,

sanders41 · 2024-02-02T15:34:42Z

meilisearch/index.py

@@ -43,7 +44,7 @@ def __init__(
            Primary-key of the index.
        """
        self.config = config
-        self.http = HttpRequests(config)
+        self.http = http if http is not None else HttpRequests(config)


Suggested change

self.http = http if http is not None else HttpRequests(config)

self.session = session if session else Session()

sanders41 · 2024-02-02T15:36:15Z

meilisearch/client.py

@@ -130,6 +130,7 @@ def get_indexes(self, parameters: Optional[Mapping[str, Any]] = None) -> Dict[st
                index["primaryKey"],
                index["createdAt"],
                index["updatedAt"],
+                self.http,


Suggested change

self.http,

self.session = Session()

sanders41 · 2024-02-02T15:36:52Z

meilisearch/client.py

@@ -178,7 +179,7 @@ def get_index(self, uid: str) -> Index:
        MeilisearchApiError
            An error containing details about why Meilisearch can't process your request. Meilisearch error codes are described here: https://www.meilisearch.com/docs/reference/errors/error_codes#meilisearch-errors
        """
-        return Index(self.config, uid).fetch_info()
+        return Index(self.config, uid, http=self.http).fetch_info()


Suggested change

return Index(self.config, uid, http=self.http).fetch_info()

return Index(self.config, uid, http=self.session).fetch_info()

sanders41 · 2024-02-02T15:37:24Z

meilisearch/client.py

@@ -216,7 +217,7 @@ def index(self, uid: str) -> Index:
            An Index instance.
        """
        if uid is not None:
-            return Index(self.config, uid=uid)
+            return Index(self.config, uid=uid, http=self.http)


Suggested change

return Index(self.config, uid=uid, http=self.http)

return Index(self.config, uid=uid, http=self.session)

sanders41 · 2024-02-02T15:38:42Z

meilisearch/_httprequests.py

@@ -22,6 +22,7 @@ def __init__(self, config: Config) -> None:
            "Authorization": f"Bearer {self.config.api_key}",
            "User-Agent": _build_user_agent(config.client_agents),
        }
+        self.session = requests.Session()


And add session: Session to the __init__ parameters.

Suggested change

self.session = requests.Session()

self.session = session

structwafel · 2024-02-02T16:13:56Z

Currently trying to apply your changes, but not passing around the HttpRequests also affects how tasks are created.
As each task also creates a HttpReqeusts object.
https://github.com/LGXerxes/meilisearch-python/blob/lgx/requests-session/meilisearch/task.py#L14-L29

Perhaps it is easier to:

global_session = None

def get_global_session():
    global global_session
    if global_session:
        return global_session
    global_session = requests.Session()
    return global_session

class HttpRequests:
    def __init__(self, config: Config) -> None:
        self.config = config
        self.headers = {
            "Authorization": f"Bearer {self.config.api_key}",
            "User-Agent": _build_user_agent(config.client_agents),
        }
        self.session = get_global_session()

This way when creating HttpRequests it just fetches the session.
And makes it also easier to exchange the session for other libraries etc

sanders41 · 2024-02-02T16:27:32Z

Good point. I think what we could do is have the TaskHandler __init__ take an optional session like in the Index and create the handler the same way as index. This is an "off the top of my head" solution that I haven't tested yet so feel free to point out any issues if you see some.

sanders41 · 2024-02-02T16:42:25Z

Another option would be to create a http sigelton in _httprequests.py and have everything just use that.

structwafel · 2024-02-14T10:51:08Z

@sanders41 I think the singleton pattern is probably the best choice here.

Don't see any issues with this implementation.

curquiza · 2024-10-03T13:53:00Z

Closing this for lack of activity and the tests are still failing. Feel free to re-open of course if you want to keep working on it

Changed requests.get/etc to sessions

64e580f

Formated with black

b5d658c

path session.get instead of request.get

892f2b7

sanders41 requested changes Feb 2, 2024

View reviewed changes

singleton pattern for HttpRequests

b74c26b

Merge branch 'main' into lgx/requests-session

db51072

curquiza closed this Oct 3, 2024

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Using Request.Sessions for faster and less open connections #923

Using Request.Sessions for faster and less open connections #923

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structwafel commented Feb 14, 2024

curquiza commented Oct 3, 2024

	http: Optional[HttpRequests] = None,
	session: Optional[Session] = None,

	self.http = http if http is not None else HttpRequests(config)
	self.session = session if session else Session()

	return Index(self.config, uid, http=self.http).fetch_info()
	return Index(self.config, uid, http=self.session).fetch_info()

	return Index(self.config, uid=uid, http=self.http)
	return Index(self.config, uid=uid, http=self.session)

Using Request.Sessions for faster and less open connections #923

Using Request.Sessions for faster and less open connections #923

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structwafel commented Feb 2, 2024 • edited Loading

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