locust | Distributed web data discovery and collection framework | Serverless library

How do I pass the number of total users to simulate and spawn rate in the Web UI when I run the locust file, instead, I would like to pass them as variables in the script itself?

I wrote a FastAPI and try to perform load tests using different tools. I have found that the performance from Locust is vastly different from time() python function:

• Locust shows min=17ms, max=2469ms, 99%=2000ms
• time() function shows min()=3ms, max=1739ms

Can someone please shed a light on why is that? Which one is more accurate?

Below are my programs:

Fast API Function:

Anyway with Locust Web UI to specify tasks with a certain tag to run?

So right now we are limited with load tests in certain environments, and ramping up the services under load just doesn't produce the same results as in production. Short term we would like to tag certain tests and run those under isolation to get the same results as in production until we have the infrastructure in place in all environments. I know you can run tasks with a certain tag through the CLI but is there anyway to do this through the Web UI? Can you customize the Web UI to do this, which may be the better question?

I'm looking for an alternative tool to Gatling and found Locust. I found it's powerful but I wonder how can I extract a Json value and then using that value in the Json payload of the next request (please note the Json payload is in different file). Like in Gatling we can use saveAs() and the value will be store in the session variable, then we can put that value in Json payload.

Thanks, Hoang

I would like to load-test a SignalR service using Locust. I found that the following library can send and receive SignalR requests: https://pypi.org/project/signalrcore/

Now, according to the Locust docs, the next step would be to write a custom client for Locust that can send SignalR requests. But there is the following warning:

Any protocol libraries that you use must be gevent-friendly (use the Python socket module or some other standard library function like subprocess), or your calls are likely to block the whole Locust/Python process.

Some C libraries cannot be monkey patched by gevent, but allow for other workarounds. For example, if you want to use psycopg2 to performance test PostgreSQL, you can use psycogreen

I am a beginner in Python so I don't understand exactly what it means. The library "signalrcore" I am using is 100% synchronous. Does it means I can't use it with Locust? I found an a fork of signalrcore that uses asyncio. Should I use that fork instead and just make sure all my signalr calls are non blocking?

Thanks!

following are my files for html, .ts and json . As json data was very extensive therefore i have just added a few states and their cities. my 1st dropdown is showing all states. Now I want to match my 1st dropdown's selected value of state with a key "state" in "cities" object in my json file so i can populate 2nd dropdown with cities relevant to that state. and I want to do this in function "getCitiesForSelectedState". please help me find solution for this.

//.ts file

I am looking at the Locust Documentation and one of the flag in configuration is

how to generate locust html file without UI？

I have a website that I'm doing where one page flashes a Layout Shift on visiting another page. No other page does this, and I'm not sure how to figure it out. If somebody has some Framer Motion insight they'd like to share with me on how to troubleshoot this, I'd be most grateful. I've also found out that when it's in development it doesn't happen, but when I deploy to production, it does.

The page: https://krista-doubleday--preview-apq5vrih.web.app/contact

Here is the code for that page: