# Vapor: Understanding Concurrency

DevFeed: [Vapor: Understanding Concurrency](<https://devfeed.tech/articles/vapor-understanding-concurrency-3982.md>)

Original publisher: [Read original article](<https://laravel.com/blog/vapor-understanding-concurrency>)

Author: Joe Dixon

Published: 2022-06-23T14:08:00Z

Content type: tutorial

Language: en

Sources: [Laravel Blog](<https://devfeed.tech/sources/laravel-blog.md>)

Topics: [Concurrency](<https://devfeed.tech/topics/concurrency.md>), [Vapor](<https://devfeed.tech/topics/swift-vapor.md>), [AWS Lambda](<https://devfeed.tech/topics/aws-lambda.md>), [Serverless](<https://devfeed.tech/topics/serverless.md>), [web applications](<https://devfeed.tech/topics/web-applications.md>)

Tags: [applications](<https://devfeed.tech/tags/applications.md>), [aws](<https://devfeed.tech/tags/aws.md>), [aws-lambda](<https://devfeed.tech/tags/aws-lambda.md>), [concurrency](<https://devfeed.tech/tags/concurrency.md>), [http](<https://devfeed.tech/tags/http.md>), [infrastructure](<https://devfeed.tech/tags/infrastructure.md>), [scale](<https://devfeed.tech/tags/scale.md>), [serverless](<https://devfeed.tech/tags/serverless.md>)

## AI overview

This article explains concurrency in Laravel Vapor applications powered by AWS Lambda. It covers simultaneous function executions, account-wide concurrency limits, reserved and unreserved concurrency, and how concurrency settings can limit HTTP requests and queued jobs. It also introduces provisioned concurrency and cold starts.

## Source excerpt

Every application running on Vapor is powered by AWS Lambda, which allows us to run code without needing to think about servers. One of the biggest benefits of this type of infrastructure is that it a...