NextJs SSR Amplify, cold start takes up to 7 seconds

Hi, I have created an AWS Amplify Web app with NextJs SSR. Everything works fine except one huge issue : cold start takes up to 7 seconds to have server response.

I realized that if I remove all my amplify backend, the cold start drops down to less than a second. So I guess the problem comes from the AWS Amplify libraries.

I deployed a version of my website that doesn't call any getServerSideProps, but the latency stays around 7 seconds.

Here are my dependencies package.json :

"scripts": {
    "dev": "next dev",
    "build": "next build",
    "start": "next start",
    "lint": "next lint"
  },
  "dependencies": {
    "@aws-amplify/ui-react": "^4.3.2",
    "@aws-sdk/client-s3": "^3.224.0",
    "@react-icons/all-files": "^4.1.0",
    "autoprefixer": "^10.4.13",
    "aws-amplify": "^5.0.8",
    "blueimp-load-image": "^5.16.0",
    "compress.js": "^1.2.2",
    "leaflet": "^1.9.3",
    "leaflet-defaulticon-compatibility": "^0.1.1",
    "next": "13.0.4",
    "piexifjs": "^1.0.6",
    "postcss": "^8.4.19",
    "react": "18.2.0",
    "react-beautiful-dnd": "^13.1.1",
    "react-dom": "18.2.0",
    "react-icons": "^4.7.1",
    "react-leaflet": "^4.2.0",
    "react-slideshow-image": "^4.1.0",
    "react-tooltip": "^4.5.1",
    "tailwind-merge": "^1.8.0",
    "tailwindcss": "^3.2.4"
  }

And this is my amplify backend configuration :

{
  "auth": {
    "userPoolGroups": {
      "service": "Cognito-UserPool-Groups",
      "providerPlugin": "awscloudformation",
      "dependsOn": [
        {
          "category": "auth",
          "resourceName": "ressourceNamef1xxxxxxxxx",
          "attributes": [
            "UserPoolId",
            "AppClientIDWeb",
            "AppClientID",
            "IdentityPoolId"
          ]
        }
      ]
    },
    "ressourceNamef1xxxxxxxxx": {
      "service": "Cognito",
      "providerPlugin": "awscloudformation",
      "dependsOn": [],
      "customAuth": false,
      "frontendAuthConfig": {
        "socialProviders": [],
        "usernameAttributes": [
          "EMAIL"
        ],
        "signupAttributes": [
          "EMAIL"
        ],
        "passwordProtectionSettings": {
          "passwordPolicyMinLength": 8,
          "passwordPolicyCharacters": []
        },
        "mfaConfiguration": "OFF",
        "mfaTypes": [
          "SMS"
        ],
        "verificationMechanisms": [
          "EMAIL"
        ]
      }
    }
  },
  "api": {
    "ressourceName": {
      "service": "AppSync",
      "providerPlugin": "awscloudformation",
      "dependsOn": [
        {
          "category": "auth",
          "resourceName": "ressourceNamef1xxxxxxxxx",
          "attributes": [
            "UserPoolId"
          ]
        }
      ],
      "output": {
        "authConfig": {
          "defaultAuthentication": {
            "authenticationType": "AMAZON_COGNITO_USER_POOLS",
            "userPoolConfig": {
              "userPoolId": "authressourceNamef1xxxxxxxxx"
            }
          },
          "additionalAuthenticationProviders": [
            {
              "authenticationType": "API_KEY",
              "apiKeyConfig": {
                "apiKeyExpirationDays": 365,
                "apiKeyExpirationDate": "2023-12-10T15:07:46.361Z",
                "description": ""
              }
            },
            {
              "authenticationType": "AWS_IAM"
            }
          ]
        }
      }
    }
  },
  "storage": {
    "s338e9026f": {
      "service": "S3",
      "providerPlugin": "awscloudformation",
      "dependsOn": [
        {
          "category": "auth",
          "resourceName": "ressourceNamef1xxxxxxxxx",
          "attributes": [
            "UserPoolId"
          ]
        },
        {
          "category": "auth",
          "resourceName": "userPoolGroups",
          "attributes": [
            "adminGroupRole"
          ]
        },
        {
          "category": "auth",
          "resourceName": "userPoolGroups",
          "attributes": [
            "superAdminGroupRole"
          ]
        }
      ]
    }
  },
  "function": {
    "ressourceNameSendEmails": {
      "build": true,
      "providerPlugin": "awscloudformation",
      "service": "Lambda",
      "dependsOn": [
        {
          "category": "api",
          "resourceName": "ressourceName",
          "attributes": [
            "GraphQLAPIIdOutput",
            "GraphQLAPIEndpointOutput",
            "GraphQLAPIKeyOutput"
          ]
        }
      ]
    },
    "getgooglereviews": {
      "build": true,
      "providerPlugin": "awscloudformation",
      "service": "Lambda",
      "dependsOn": [
        {
          "category": "auth",
          "resourceName": "ressourceNamef1xxxxxxxxx",
          "attributes": [
            "UserPoolId"
          ]
        },
        {
          "category": "api",
          "resourceName": "ressourceName",
          "attributes": [
            "GraphQLAPIIdOutput",
            "GraphQLAPIEndpointOutput",
            "GraphQLAPIKeyOutput"
          ]
        }
      ]
    }
  }
}

Here is the way my NexJs App is initialized with amplify :

import '../styles/globals.css'
import { ContextProvider } from '../src/components/context/Context';
import Layout from '../src/components/Layout';
import '@aws-amplify/ui-react/styles.css';
import { Amplify } from 'aws-amplify';
import awsExports from '../src/aws-exports';

function MyApp({ Component, pageProps }) {
  Amplify.configure(awsExports);
//Amplify.configure({ ...awsExports, ssr: true }); //==> This doesn't change latency. issue
  return (
    <ContextProvider>
      <Layout>
        <Component {...pageProps} />
      </Layout>
    </ContextProvider>
  )
}


export default MyApp

I read on several forums that Amplify is not able to provide law latency cold start, so I better move to Vercel or Netlify (which I tried and works super well) for example. Can you please confirm the opposite? Sources : https://www.reddit.com/r/nextjs/comments/uamqbl/beware_of_nextjs_on_aws_amplify/

I also found some other solutions like keeping the lambda warm with a cron job. Is that a good idea? https://www.reddit.com/r/nextjs/comments/ml4i2t/ssr_pages_cold_start_improve_performance/ Thank you.