locust | Scalable user load simulator written in Python and gevent

 by   cgbystrom JavaScript Version: Current License: No License

kandi X-RAY | locust Summary

kandi X-RAY | locust Summary

locust is a JavaScript library. locust has no bugs and it has low support. However locust has 1 vulnerabilities. You can download it from GitHub.

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            kandi-support Support

              locust has a low active ecosystem.
              It has 68 star(s) with 7 fork(s). There are 3 watchers for this library.
              It had no major release in the last 6 months.
              locust has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of locust is current.

            kandi-Quality Quality

              locust has no bugs reported.

            kandi-Security Security

              locust has 1 vulnerability issues reported (0 critical, 0 high, 1 medium, 0 low).

            kandi-License License

              locust does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              locust releases are not available. You will need to build from source code and install.

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            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of locust
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            locust Key Features

            No Key Features are available at this moment for locust.

            locust Examples and Code Snippets

            No Code Snippets are available at this moment for locust.

            Community Discussions


            AttributeError: type object 'MyApiTask' has no attribute 'task_set' while trying to run locust
            Asked 2021-Jun-13 at 09:01

            My code is like this



            Answered 2021-Jun-13 at 09:01

            Looks like you havent updated to 1.x syntax?



            How to pass the number of total users to simulate and spawn rate in the locust script itself
            Asked 2021-Jun-10 at 19:09

            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?



            Answered 2021-Jun-10 at 19:09

            You could probably do it by accessing the Runner in code, but it would be much easier if you used a Load Shape.



            Locust Performance different from time() function
            Asked 2021-Jun-01 at 15:48

            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:



            Answered 2021-Jun-01 at 15:48

            Locust and time are measuring two different things. time is measuring how long it takes to run only your adapter.predict function, server side. Locust measures the time it takes a client to get a response from your server route, which includes not only your adapter.predict call but also who knows what all else before and after that. "Which is more accurate" depends on what it is you're trying to measure. If you just want to know how long it takes to call adapter.predict, then time will be more accurate. If you want to know how long it takes a client to get the results of your /predict route, Locust is more accurate.



            Anyway with Locust Web UI to specify tasks with a certain tag to run?
            Asked 2021-Jun-01 at 15:01

            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?



            Answered 2021-Jun-01 at 15:01

            Locust has no native way of choosing tasks to run in the web UI. There is an open request for that feature but nobody has submitted a PR for it yet.

            You can, however, extend the web UI to do whatever you want. You can either add routes like this:



            How Locust can extract value from response then using for next sequence request
            Asked 2021-May-25 at 13:19

            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



            Answered 2021-May-25 at 13:19

            Locust is pretty much just Python, using the requests http client, so look in to the requests documentation for more info.

            Lets assume /login returns a session_id in the json response that we want to use in future requests. You would then do something like this in your task:



            Load-testing Core SignalR using Locust
            Asked 2021-May-07 at 17:06

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

            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?




            Answered 2021-May-07 at 17:06

            SignalRCore seems to use requests and websocket-client under the hood, both of which are gevent-friendly. I cant say for sure, but I’d give it 90% probability that it will work ”out of the box” :)

            If you do use the asyncio one you’d need to do some magic yourself. At least I have never combined that with gevent.



            how to display cities in one dropdown based on selected state in other dropdown using json data in angular ionic?
            Asked 2021-Apr-27 at 16:44

            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



            Answered 2021-Apr-27 at 16:44

            You can do it with the $event parameter. Make sure to compare your values safely.

            If your value is not in the right type or has spaces or unwanted chars, this c.state == val might not work.

            You can use the trim function to compare your value safely: c.state.trim() == val.trim()




            How to perform web-auth in locust?
            Asked 2021-Apr-08 at 23:27

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



            Answered 2021-Apr-08 at 23:27

            That --web-auth parameter for Locust has to do with enabling authentication required to use the Locust web UI, in order to secure the site so not just anyone with access to where you are running Locust from could mess with your test or see the results. The username and password you specify with that would be required when visiting the Locust UI. It's meant to be a quick and easy way of securing it for a single user so it only takes one username and password.

            If you're looking for how to use Basic Auth for web requests on your test, Locust is based on Python Requests so something like this should help:


            EDIT: Locust UI isn't really designed for multiple users out of the box. In my experience, the last user who accesses the UI gets a working page and anyone else who had been working before then breaks with weird behavior including inconsistent data or no data. I solved it by setting up an nginx reverse proxy in front of the UI. You could do the same and have nginx perform the authentication instead of Locust itself. Something like this may work:




            how to generate locust html file without UI?
            Asked 2021-Apr-03 at 12:31

            how to generate locust html file without UI?



            Answered 2021-Mar-12 at 04:43

            config file should follow all of the document examples, key=value:



            Layout shift on exit animation with Framer Motion and NextJS
            Asked 2021-Mar-26 at 21:53

            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:

            Here is the code for that page:



            Answered 2021-Mar-26 at 21:53

            I managed to trace the issue to the CSS modules. Basically, when the page change happens, all of the CSS modules are destroyed, using the new page's CSS module instantly. Therefore, all of the associated styling was broken because Motion just 'saves' the component state while animating out - not the stylesheet.

            I've since just switched to JSS using makeStyles() and the problem is now gone. :)


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            A stored cross-site scripting (XSS) vulnerability affects the Web UI in Locust before 1.3.2, if the installation violates the usage expectations by exposing this UI to outside users.

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