Four Line Fridays: BOO! It's a CVE! and two ways AI failed me this week

Four Line Fridays

Welcome to Four Line Friday! Every week on Fridays, I’m sending you four lines of 120 characters or less that help you ship better, more performant Ruby.

Here’s your four lines:

1. Is everyone having fun yet? Do you have Claude Defense Access, ChatGPT Daybreak, and DeepSeek v4.1 ready to go?

2. My AI data policy is open source. No-train endpoints on US GPUs only (except our good friends at OpenAI and Anthropic).

3. Claude’s TRICK entry can’t beat all past human ones (LLM as judge). Still hope! Run: curl -sL speedshop.co/trick | sh

4. I sic’d Token Jesus (Astra xhigh) on Ruby + Fil-C. 100% compat seems attainable, but it’s 4x slower and uses 4x the RSS.

Thanks for reading! We’ll see you next Friday.

Want to see past Four Line Fridays? I’ve got every single one in a searchable archive here.

I’m Nate, the author of The Complete Guide to Rails Performance, a maintainer of Puma, and owner of the Rails perf consultancy Speedshop. You’re on this email list because you either bought something from me or signed up in the past.

In the meantime, follow me on X, Mastodon, or Bluesky, or consider buying:

The Complete Guide to Rails Performance, my “reference manual” for all things Rails perf.

Sidekiq in Practice, a workshop to improve your Sidekiq operational skills.

The Rails Performance Apocrypha, a meandering fun read about a potpourri of Rails perf topics.

Or maybe we should work together? Over 10 companies now have me on permanent retainer to help supercharge their performance and platform engineering.

-Nate