Aws api gateway really slowly

Serverless Framework
1

Hello Guys,

I started testing serverless framework today and it is awesome, but i’m having a problem with AWS that I’d like to know if anyone is also experiencing.

After creating the basic project with hello world function I attached the http event to use API Gateway and for my surprise the response time is taking around ~550ms

I know there would be some latency since I’m in São Paulo making requests to us-east-1, but this is just way above my expectations

So, is just me or there are other people facing this problem? Is there any recommendations to improve performance on API Gateway?

2

@renanosf what is your Lambda execution time? I assume it is very quick for a hello world, but it is worth asking.

3

Just 2ms testing from the lambda console

4

We use runscope to monitor our endpoints. We see similar latency from the Brazil location. I’m not sure about methods of improving this other than developing a multi-region architecture. Would like to see if others have solutions.

5

Well, I hope aws to launch api gateway and lambda in São Paulo region anytime soon. Although I’m not sure about that after all that time without it.

6

Just to be perfectly clear, you did try doing multiple requests? Because first request is supposed to be slower but subsequent requests are faster.

I get similar latency from EU to US with my first request, but it’s good afterwards.

7

I did a test with 1000 requests and the average time was 551ms.

Now the weird part of the test is that once in a while the request returns in ~200ms as I was previously expecting

8

I have similar issues from Sydney to us-east-1 and us-west-2. For example: I have a Rails app hosted in us-west-2 that responds in about 450ms but the Lambda function via the API GW is taking 750ms despite the Lambda function itself running in less than 50ms. us-east-1 was even worse at 950ms and you needed to double those times from a user perspective if it triggers a CORS pre-flight check.

In the end I’ve decided to no worry about it. I can find ways to keep the response times within acceptable limits and being able to easily scale wins.

1 Like
9

Is API gateway always putting 200-300ms of latency in front of lambda requests:

It’s an ongoing problem:
https://forums.aws.amazon.com/thread.jspa?threadID=225458

Has anyone found a way around it? It seems Lambda + API Gateway only avoids this latency if your app is already so large that you’re doing 100 requests per second (per function).