--- title: Load testing an event-driven message queue | daily.dev description: A walkthrough of load testing an event-driven queue's HTTP events API using K6, a Go-based load testing tool. Covers setting up basic K6 scripts, running... canonical: https://daily.dev/posts/load-testing-an-event-driven-message-queue-ahkckjqri twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Load testing an event-driven message queue | daily.dev og:description: A walkthrough of load testing an event-driven queue's HTTP events API using K6, a Go-based load testing tool. Covers setting up basic K6 scripts, running... og:url: https://daily.dev/posts/load-testing-an-event-driven-message-queue-ahkckjqri og:image: https://api.daily.dev/og/posts/AHKckjqRi.png og:image:alt: Load testing an event-driven message queue og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Load testing an event-driven message queue **[Inngest Blog](https://daily.dev/sources/inngest)** · 6 min read · 0 upvotes · 0 comments ## Summary A walkthrough of load testing an event-driven queue's HTTP events API using K6, a Go-based load testing tool. Covers setting up basic K6 scripts, running virtual-user ramp tests, and interpreting metrics like p90/p95 latency. Includes real-world results from testing on AWS ECS/SQS infrastructure, showing latency increases significantly under load, with a recommendation of roughly 1 vCPU per 150 requests/second on a 1GB RAM instance. Ends with a plug for the company's hosted cloud service as a zero-setup alternative. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How do I run a basic load test against an HTTP API using k6? Write a small JavaScript script that imports k6/http and posts a JSON payload to the target URL, then run it with a command like k6 run --vus 25 --duration 30s ./post.js. This ramps up 25 virtual users making continuous POST requests for 30 seconds and prints metrics including http_req_duration, requests per second, and failure rate. _daily.dev surfaces practical k6 workflows for developers benchmarking their own APIs before shipping._ ### How many requests per second can a small AWS ECS instance handle before latency degrades badly? On a 1GB RAM / 0.5 vCPU ECS instance, an events API handled 110 requests/second with median latency around 7.7ms, but at 300 requests/second median latency jumped to about 91.7ms, with p99 reaching 187ms. This suggests provisioning roughly 1 vCPU per 150 requests/second for similar workloads. _engineers sizing infrastructure for event APIs can track real-world capacity benchmarks like this on daily.dev._ ## Similar posts on daily.dev - [Load testing a web API with k6](https://daily.dev/posts/load-testing-a-web-api-with-k6-gvpnzzpj0) · Flavio Copes · 1 upvotes · 0 comments - [How to generate real-world load tests using Grafana Cloud k6 and production telemetry](https://daily.dev/posts/how-to-generate-real-world-load-tests-using-grafana-cloud-k6-and-production-telemetry-tu3zo1jh6) · Grafana Labs · 0 upvotes · 0 comments - [The Complete Guide to Message Queues and Event Streaming: Building Scalable, Reliable, and Real-Time Distributed Systems](https://daily.dev/posts/the-complete-guide-to-message-queues-and-event-streaming-building-scalable-reliable-and-real-time-72zillsk8) · Medium · 0 upvotes · 0 comments - [API Performance Testing: How to Design Realistic Tests](https://daily.dev/posts/api-performance-testing-how-to-design-realistic-tests-id4corgba) · DEV · 4 upvotes · 0 comments - [Scaling Java-Based Real-Time Systems: The Hidden Tradeoffs of Event-Driven Design](https://daily.dev/posts/scaling-java-based-real-time-systems-the-hidden-tradeoffs-of-event-driven-design-ef85inlwt) · InfoQ · 8 upvotes · 1 comments --- Tags: [#architecture](https://daily.dev/tags/architecture), [#aws](https://daily.dev/tags/aws), [#inngest](https://daily.dev/tags/inngest), [#load-testing](https://daily.dev/tags/load-testing) [View this post on daily.dev](https://daily.dev/posts/load-testing-an-event-driven-message-queue-ahkckjqri) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Load testing an event-driven message queue","url":"https://daily.dev/posts/load-testing-an-event-driven-message-queue-ahkckjqri","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/load-testing-an-event-driven-message-queue-ahkckjqri"},"datePublished":"2026-09-13T19:57:27.707Z","dateModified":"2026-10-15T02:22:36.384Z","description":"A walkthrough of load testing an event-driven queue's HTTP events API using K6, a Go-based load testing tool. 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