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Questions tagged [cold-start]

In general, a cold start is the start-up of a recently unused ("cold") application, typically incurring an above average start-up time. In contrast, a recently used application is considered "warm."

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How to force a reload for lambda function's global variables?

I'm planning to move my lambda function configuration from environment variables to DynamoDb since my lambda functions share configurations and also I don't want to redeploy my lambda functions each time a configuration changes (my config changes…
Mehran
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How to reduce the time taken to launch the app in cold start

I'm trying to optimize my app. We have launch Interstitial Ad in our app. When there is a Ad, app takes around 7-8 seconds to start the home screen. When Ad is not available, it takes 3 seconds to launch the home screen. Problem is with the cold…
Sangeetha Pinto
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Delay between app process start and Application onCreate

I'm working on an application with large codebase. The problem is that when I launch the app from cold start state, It takes a lot of time to show the first screen of the app. Based on here I checked the TTID for the app and it was terrifying:…
Saman Sattari
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Google Cloud Function with minimum instances: cold start after every deployment?

To minimize cold starts, I've set a minimum instance for my Google Cloud Function. I actually do it with the firebase admin SDK like this: functions.runWith({ minInstances: 1 }) ...but I can see it confirmed in Google Cloud Console: I'm noticing…
Johnny Oshika
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How to improve performance of initial calls to AWS services from an AWS Lambda (Java)?

I recently tried to analyze some performance issues on a service hosted in AWS Lambda. Breaking down the issue, I realized that it was only on the first calls on each container. When isolating the issue, I found myself creating a new test project to…
Wietlol
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Get overview of cold starts in AWS Lambda

Is it possible to get an overview of AWS Lambda cold starts, i.e. how many there were and how long they took? I know there are solutions for cold starts, and I know I could log something on a cold start, but that is not what I need. I want an…
Peter
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Python script to warm AWS lambda for cold start problem

I followed the lambda-warmer https://github.com/jeremydaly/lambda-warmer for NodeJS to create a similar script for python: Warm the lambda function every a few minutes Warm more than one lambda functions if I set up the concurrency parameters Here…
simonhb1990
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How to Measure Azure Function Cold Start Time

I've been doing research lately around Azure Function cold start time that can occur with a consumption-based plan. I understand the concepts, but how do I actually measure the cold start time of my Azure Functions? I can't seem to find any good…
ElliotSchmelliot
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Azure Functions language and runtime version choice to minimize cold-start time

I'm starting a new project that has strict requirements that the cold-start time has to be minimal. We are talking about sub-second response-time. I haven't found any comparison of the cold-start times by language and runtime version. Does anyone…
mattipet
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Do serverless functions install modules every time they are called?

Do server-less functions install modules every time they are called? I am trying to understand how serverless functions really work. I understand that serverfull is basically a computer that executes code and that the server code runs on it 24/7…
YulePale
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AWS Lambda | lambda cold start

I have a lambda that keep experiencing cold start. I configured the lambda to have 5 provisioned concurrency, as it was suggested as a possible solution, but the lambda still have cold starts. What might be a possible explanation? Maybe 5…
Sharon
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How dependencies affect Firebase Functions cold start?

Background: I have about 20 Firebase Cloud Functions and they are stored under the default reporoot/functions/src/ folder, which was created when I first init the Firebase project. Each Cloud Function could have its own unique dependencies and all…
Cupid Chan
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Measuring cold start time in google cloud metrics explorer

We are working on some optimizations to decrease cold start time in our firebase cloud functions. As a result of this we'd like to compare the execution times before and after these changes were implemented. Is there a reliable way to measure cold…
Alex
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How could I reduce the long cold start time when doing SSR from Lambda

I have an SSR server for React.JS app made with CRA, ConnectedRouter, Redux and Saga. I am trying to host this server under AWS Lambda using the below code: const serverlessExpress = require('@vendia/serverless-express'); const app =…
Igor Shmukler
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Does the size of the node_modules folder matters during cold starts for cloud functions?

I know that you should only import the required modules inside the index file's global scope to reduce the time of the cold starts. But I haven't yet found out that if the size of the node_modules folder (or the length of the dependencies property…
desper8soul
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