--- title: "Posts by Ken Ahrens | Speedscale" description: "Browse all blog posts written by Ken Ahrens on the Speedscale blog." canonical: "https://speedscale.com/blog/author/ken-ahrens/" --- # Posts by Ken Ahrens Co-founder and CEO of Speedscale, passionate about performance engineering. • 9 posts published [![Holiday readiness: run your first load test with skills](https://speedscale.com/_astro/load-test-result.p3PABOMt_uMuku.webp)](https://speedscale.com/blog/holiday-readiness-proxymock-skills/) Oct 6, 2026 ### [Holiday readiness: run your first load test with skills](https://speedscale.com/blog/holiday-readiness-proxymock-skills/) Start holiday readiness with a local proxymock load test. Use agent skills to record a Node app, mock its API dependency, and inspect the results. [Performance testing](https://speedscale.com/blog/category/performance-testing/) [Developer tools](https://speedscale.com/blog/category/developer-tools/) [by Ken Ahrens](https://speedscale.com/blog/author/ken-ahrens/) [![Use AI and traffic replay to test AI-generated code](https://speedscale.com/_astro/hero.7DRmVYlW_24NNTV.webp)](https://speedscale.com/blog/test-ai-code-with-traffic-replay/) Sep 15, 2026 ### [Use AI and traffic replay to test AI-generated code](https://speedscale.com/blog/test-ai-code-with-traffic-replay/) Have your coding agent test AI-generated code with proxymock: capture working API traffic, replay it against changes, and inspect the results. [API testing](https://speedscale.com/blog/category/api-testing/) [Developer tools](https://speedscale.com/blog/category/developer-tools/) [AI/ML](https://speedscale.com/blog/category/ai/ml/) [Traffic Replay](https://speedscale.com/blog/category/traffic-replay/) [by Ken Ahrens](https://speedscale.com/blog/author/ken-ahrens/) [![I built an API traffic classifier for business workflows](https://speedscale.com/_astro/featured-image.BC9UcvJH_2uOXJ.webp)](https://speedscale.com/blog/reading-business-workflows-out-of-api-traffic/) Aug 25, 2026 ### [I built an API traffic classifier for business workflows](https://speedscale.com/blog/reading-business-workflows-out-of-api-traffic/) I pointed a classifier at 7,943 API calls to find business workflows. It worked, then showed where my assumptions about sessions and patterns fell apart. [API Testing](https://speedscale.com/blog/category/api-testing/) [Developer tools](https://speedscale.com/blog/category/developer-tools/) [by Ken Ahrens](https://speedscale.com/blog/author/ken-ahrens/) [![Synthetic Monitoring Is Broken. Your Production Traffic Can Fix It.](https://speedscale.com/_astro/featured-image.BYcmwb2r_Z1TMyPb.webp)](https://speedscale.com/blog/synthetic-monitoring-is-broken-production-traffic-can-fix-it/) Aug 13, 2026 ### [Synthetic Monitoring Is Broken. Your Production Traffic Can Fix It.](https://speedscale.com/blog/synthetic-monitoring-is-broken-production-traffic-can-fix-it/) Synthetic monitoring depends on scripts engineers maintain by hand. Capturing and replaying real production transactions turns customer behavior into tests. [Observability](https://speedscale.com/blog/category/observability/) [API Testing](https://speedscale.com/blog/category/api-testing/) [Traffic Replay](https://speedscale.com/blog/category/traffic-replay/) [by Ken Ahrens](https://speedscale.com/blog/author/ken-ahrens/) [![Two confident fixes missed this production bug](https://speedscale.com/_astro/proxymock-traffic-capture.HH8ssbi5_Ze4X1s.webp)](https://speedscale.com/blog/two-confident-fixes-missed-this-production-bug/) Jul 24, 2026 ### [Two confident fixes missed this production bug](https://speedscale.com/blog/two-confident-fixes-missed-this-production-bug/) A production bug survived two confident fixes and green tests. Replaying the captured request exposed the missing state and proved the real fix. [Developer tools](https://speedscale.com/blog/category/developer-tools/) [API Testing](https://speedscale.com/blog/category/api-testing/) [by Ken Ahrens](https://speedscale.com/blog/author/ken-ahrens/) [![Top 14 Postman Alternatives for API Testing in 2026](https://speedscale.com/_astro/featured-image.BwN4Uabo_1Ot1Oh.webp)](https://speedscale.com/blog/top-14-postman-alternatives/) Updated Jul 20, 2026 ### [Top 14 Postman Alternatives for API Testing in 2026](https://speedscale.com/blog/top-14-postman-alternatives/) A rebuilt 2026 guide to Postman alternatives. Which API clients are still maintained, what they cost, and which one fits local-first, gRPC, or team workflows. [API Testing](https://speedscale.com/blog/category/api-testing/) [Developer Productivity](https://speedscale.com/blog/category/developer-productivity/) [by Ken Ahrens](https://speedscale.com/blog/author/ken-ahrens/) [![AI writes code in seconds, but delivery still takes days](https://speedscale.com/_astro/featured-image.CUbqngAy_Zc4ROT.webp)](https://speedscale.com/blog/ai-delivery-bottleneck/) Jul 9, 2026 ### [AI writes code in seconds, but delivery still takes days](https://speedscale.com/blog/ai-delivery-bottleneck/) AI pushed throughput up 59%, yet median delivery got worse. The bottleneck moved to validation. How replaying production traffic in CI closes the gap. [AI/ML](https://speedscale.com/blog/category/ai/ml/) [Observability](https://speedscale.com/blog/category/observability/) [DevOps](https://speedscale.com/blog/category/devops/) [by Ken Ahrens](https://speedscale.com/blog/author/ken-ahrens/) [![Which Bugs AI Agents Fix Better With Traffic](https://speedscale.com/_astro/featured-image.CJjwTu9j_Z1PQtaT.webp)](https://speedscale.com/blog/ai-rework-tax-which-bugs/) Jun 29, 2026 ### [Which Bugs AI Agents Fix Better With Traffic](https://speedscale.com/blog/ai-rework-tax-which-bugs/) A second run of our AI bug-fixing benchmark shows where captured traffic lifts agents toward 90%, why service maps barely help, and which bugs still fail. [AI/ML](https://speedscale.com/blog/category/ai/ml/) [Developer tools](https://speedscale.com/blog/category/developer-tools/) [API Testing](https://speedscale.com/blog/category/api-testing/) [by Ken Ahrens](https://speedscale.com/blog/author/ken-ahrens/) [![Build WireMock mappings fast from real traffic](https://speedscale.com/_astro/featured-image.CJK63d3z_1YWyIx.webp)](https://speedscale.com/blog/wiremock-export/) Jun 18, 2026 ### [Build WireMock mappings fast from real traffic](https://speedscale.com/blog/wiremock-export/) Skip hand-writing WireMock stubs. Speedscale records your real request and response traffic and exports it straight to WireMock mappings. [Service Mocking](https://speedscale.com/blog/category/service-mocking/) [API testing](https://speedscale.com/blog/category/api-testing/) [by Ken Ahrens](https://speedscale.com/blog/author/ken-ahrens/) ## Try Speedscale free Choose the desktop proxymock or the hosted cloud trial to get started. 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