Slow response time about mockoon

[bruce-c-liu]

Hi, has there been any updates on this? I'm on macOS Catalina. With latency set to 0, a simple GET is taking 6-1500ms (avg 600ms). 😭

Latest Chrome and Postman both have this unstable behavior.

[255kb]

hi @bruce-c-liu
Unfortunately no, we were unable to reproduce this on our setups, nor to find a pattern. We don't get many reports of this issue, and it seems that it's not always the same problem among the reports: random slowness vs 2 seconds slowness on all calls.

[hmalatini]

I have joined the spectrum chat! We can continue there! Thanks!

[255kb]

Hi, I just tried with the same payload in a JSON file and it's under 10ms (Windows 10) and pretty stable (6.5ms, 7.5ms, 7.5ms...). Which OS are you using?

[ozzie1998]

MacBook Pro early 2011 latest Mac OS

[255kb]

I tried to reproduce the bug on Sierra 10.13 with your file but I get pretty good results too, between 6 and 30ms.
I am not sure what is affecting the performances. Could you maybe send a screenshot of your environment ?

[ozzie1998]

Its running on High Sierra latest, with very little else running. I’ve moved on to writing my own little server to serve JSON

…

On Wed, 29 Aug 2018 at 10:03 pm, Guillaume ***@***.***> wrote: I tried to reproduce the bug on Sierra 10.13 with your file but I get pretty good results too, between 6 and 30ms. I am not sure what is affecting the performances. Could you maybe send a screenshot of your environment ? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#48 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/Ae8bflIqRvjwMRDH7-FM0BkfNGmpb1-9ks5uVwGkgaJpZM4WB7vH> .

[255kb]

Sorry to hear that, I honestly don't know what can cause this latency.
I will close as I can't reproduce the bug.
This will / may be reopened when we have more information or a way to reproduce it.

[schidaine]

I can reproduce on MacOS Mojave. Using short 42 response for a GET /answer, I get a mean at 600ms, from 200ms to 1,5s. Can't explain why so far.

[abiodunjames]

I can reproduce this on MacOS mojave as well. The response time is too slow

[hmalatini]

Same here. Few days ago started to response with delay of avg 1 second. OS is Widnows 10

[hmalatini]

I fixed it disabling CORS feature. Now it works well. Probably there is something with the performance related with CORS

[255kb]

Hi @hmalatini
It is strange that disabling CORS feature solved the problem as it basically answers 200 to all OPTIONS calls. Nothing really fancy here.
Also, I was never able to reproduce this or get any setup that allows me to do so. Do you use any third party software that could interfere, like Fiddler?

[hmalatini]

@255kb
Yes, it is really weird. But is basically what I did for get responses fast again. I don't use any third party software that can interfere. If I can help you with something, just let me know

[255kb]

Could you try to reproduce and send me the relevant data (through export menu) if possible. Also, knowing which app/browser you used to call the endpoints would be useful.
Thank you

[hmalatini]

Yes, I could reproduce it. In fact, I can realized of something weird. The solution has nothing to do with CORS. I made a video for show the steps that I did for reproduce it, and how I fixed it. Can we talk via email and I can show you what I did? For security reasons, I can't pass the mocked data that I did for test because it is confidentially of my company.
My browser is: Versión 86.0.4240.75 (Build oficial) (64 bits)

[255kb]

Great! Can you join the chat: https://spectrum.chat/mockoon ? or we can talk by email: [email protected]

[bruce-c-liu]

Hmm, that's unfortunate. FYI, restarting the environment at least fixes this issue for about 10 minutes. Then, the problem I had starts happening. Perhaps it's some kind of memory leak.

[255kb]

While the app may not have the best performances I didn't notice any big memory leak under a normal usage (i.e. connected to a front-end app that perform requests like a normal front-end app 😄 ). Maybe under heavy load? What is you typical usage?

[meinto]

Same problem here. I have an environment with a single POST route. The response time is between 40ms and 1.5 seconds. But response times below 100ms are extremly rare. Mostly they are in a range between 300ms & 1.5s.

I'm on MacOS Catalina.

[255kb]

@meinto This issue is very strange. We investigate this from time to time and are unable to find a root cause.
However, I found some discussions regarding slowness with NodeJS and DNS resolving on localhost. Have you tried calling the mock API with http://127.0.0.1:port, instead of localhost?