David Mello

@reallymello

Breaker of software, geek, meme enthusiast, easily distracted by birds. Subscribe to me on YouTube! youtube.com/c/reallyMello

Florida

davidmello.com

Joined April 2015

172 Following

137 Followers

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David Mello
@reallymello
Oct 3
Floating ghosts, singing pumpkins, and creatures on the house, all from three projectors in the front yard 👻🎃 The ghost screen is just gray tulle stretched on a scrap wood frame. The trick-or-treaters loved it. Full build 👇 #Halloween #DIY
How to Make a Halloween Hologram With a Projector and Tulle
From davidmello.com
David Mello
@reallymello
Sep 20
Parallel test runs are great until a test changes global state, like the server date, and breaks its neighbors. I wrote up three ways to mix serial and parallel tests in #Playwright
Run Parallel and Serial Tests Together in Playwright
From davidmello.com
David Mello
@reallymello
Sep 19
4 ways to run fewer tests without missing bugs leveraging either #codecoverage or content. Notes from a #StarEast talk that shows the trade-offs
Test Selection: Run Fewer Tests, Catch the Same Bugs
From davidmello.com
David Mello
@reallymello
Sep 6
An #AI-generated #K6 load test took 30 minutes to build and passed every check. The app fell over in production days later. A silent try/catch had been swallowing every error the whole time. What the #StarEast 2026 session taught me about AI guardrails:
AI Performance Testing Guardrails Every Tester Needs
From davidmello.com
David Mello
@reallymello
Aug 30
I reused our #Playwright functional tests to drive load testing. A SAS performance engineer did the exact same thing, independently, using different tools. Neither of us knew the other existed. We hit the same wall too. Two teams, one answer:
Reuse Your Playwright Tests for Load Testing
From davidmello.com
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