--- title: "Posts about developer tools | Speedscale" description: "Browse posts in the developer tools category." canonical: "https://speedscale.com/blog/category/developer-tools/" --- # Posts about developer tools Browse 79 posts in this category [![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/) [![Test Your MySQL 8.4 Upgrade With Real App Queries](https://speedscale.com/_astro/featured-image.CHm1I__d_2wbnrB.webp)](https://speedscale.com/blog/mysql-load-regression-testing-real-queries/) Sep 25, 2026 ### [Test Your MySQL 8.4 Upgrade With Real App Queries](https://speedscale.com/blog/mysql-load-regression-testing-real-queries/) Replay your app's recorded MySQL statements against 8.4 to catch upgrade regressions, then load test the database with the same workload using proxymock. [Performance testing](https://speedscale.com/blog/category/performance-testing/) [Traffic Replay](https://speedscale.com/blog/category/traffic-replay/) [Developer tools](https://speedscale.com/blog/category/developer-tools/) [by Matt LeRay](https://speedscale.com/blog/author/matt-leray/) [![Test PostgreSQL With the Queries Your App Actually Runs](https://speedscale.com/_astro/featured-image.BFaUVvHc_1mQmcW.webp)](https://speedscale.com/blog/postgres-load-regression-testing-real-queries/) Sep 24, 2026 ### [Test PostgreSQL With the Queries Your App Actually Runs](https://speedscale.com/blog/postgres-load-regression-testing-real-queries/) Replay recorded PostgreSQL queries to catch schema regressions and run realistic database load tests with proxymock, using the CLI or an AI assistant. [Performance testing](https://speedscale.com/blog/category/performance-testing/) [Traffic Replay](https://speedscale.com/blog/category/traffic-replay/) [Developer tools](https://speedscale.com/blog/category/developer-tools/) [by Matt LeRay](https://speedscale.com/blog/author/matt-leray/) [![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/) [![eBPF: Correlating rustls Plaintext to TCP Connections Without a File Descriptor](https://speedscale.com/_astro/featured-image.BGElMnA8_1GJpnM.webp)](https://speedscale.com/blog/ebpf-rustls-plaintext-tcp-correlation/) Sep 14, 2026 ### [eBPF: Correlating rustls Plaintext to TCP Connections Without a File Descriptor](https://speedscale.com/blog/ebpf-rustls-plaintext-tcp-correlation/) Follow an eBPF debugging trail through rustls, Tokio inlining, and an empty map to learn how TLS plaintext gets matched to the right TCP connection. [Developer tools](https://speedscale.com/blog/category/developer-tools/) [Observability](https://speedscale.com/blog/category/observability/) [by Shaun Duncan](https://speedscale.com/blog/author/shaun-duncan/) [![Five Ways to Use OpenTelemetry Beyond Observability](https://speedscale.com/_astro/featured-image.BaNww2J5_Z1wvIug.webp)](https://speedscale.com/blog/opentelemetry-beyond-observability/) Sep 11, 2026 ### [Five Ways to Use OpenTelemetry Beyond Observability](https://speedscale.com/blog/opentelemetry-beyond-observability/) Teams run inventory, security logs, request routing and billing through OpenTelemetry. Five non-observability uses, and the failure mode of each. [Observability](https://speedscale.com/blog/category/observability/) [DevOps](https://speedscale.com/blog/category/devops/) [Developer tools](https://speedscale.com/blog/category/developer-tools/) [by Matt LeRay](https://speedscale.com/blog/author/matt-leray/) [![From Handwritten Mocks to proxymock: The Complete Loop](https://speedscale.com/_astro/featured-image.DW4fVrDn_Z22opF9.webp)](https://speedscale.com/blog/handwritten-mocks-to-proxymock/) Sep 3, 2026 ### [From Handwritten Mocks to proxymock: The Complete Loop](https://speedscale.com/blog/handwritten-mocks-to-proxymock/) Part 10 of Getting Started with Mocks: use proxymock to record real API traffic, inject failures, verify side effects, and expose contract drift. [Getting Started with Mocks](https://speedscale.com/blog/category/getting-started-with-mocks/) [API Testing](https://speedscale.com/blog/category/api-testing/) [Developer tools](https://speedscale.com/blog/category/developer-tools/) [by Matt LeRay](https://speedscale.com/blog/author/matt-leray/) [![Did It Actually Send?](https://speedscale.com/_astro/featured-image.D1KokaIp_Z280uuM.webp)](https://speedscale.com/blog/did-it-actually-send/) Sep 2, 2026 ### [Did It Actually Send?](https://speedscale.com/blog/did-it-actually-send/) Part 4 of Getting Started with Mocks: the notifier stops returning a message and starts sending one, so the test needs a spy instead of a return value. [Getting Started with Mocks](https://speedscale.com/blog/category/getting-started-with-mocks/) [API Testing](https://speedscale.com/blog/category/api-testing/) [Developer tools](https://speedscale.com/blog/category/developer-tools/) [by Matt LeRay](https://speedscale.com/blog/author/matt-leray/) [![Make Failure Boring with Mocks](https://speedscale.com/_astro/featured-image.gxXFhYgU_Z161Ibn.webp)](https://speedscale.com/blog/make-failure-boring/) Sep 2, 2026 ### [Make Failure Boring with Mocks](https://speedscale.com/blog/make-failure-boring/) Part 3 of Getting Started with Mocks: the same seam, now returning refusals, timeouts and nonsense, so the failure paths finally get tested. [Getting Started with Mocks](https://speedscale.com/blog/category/getting-started-with-mocks/) [API Testing](https://speedscale.com/blog/category/api-testing/) [Developer tools](https://speedscale.com/blog/category/developer-tools/) [by Matt LeRay](https://speedscale.com/blog/author/matt-leray/) ## Try Speedscale free Choose the desktop proxymock or the hosted cloud trial to get started. [Free Desktop Tool](https://docs.speedscale.com/proxymock/getting-started/installation/) [Free Cloud Trial](https://app.speedscale.com/signup)