ReadwellStories from the teams building the internet.
Reading edition · Sat, Oct 31
Engineering blogs from the teams building the internet — short publisher excerpts, linked to the source.
260 matching blogs. Page 1.
posthog.comPostHog ships code at a rapid pace, and that pace has only accelerated in recent months due to LLM adoption. We went from merging 1,354 PRs in October…
posthog.comWe spend 2 trillion+ LLM tokens per month, with the lion's share going to running agents. We know what they do and how good they are most of the…
posthog.comTL;DR We're rebuilding how PostHog stores events making queries about a third faster on average, and up to 2x faster for common queries. $set , $set…
posthog.comFrom the archive 2026
Tokio, Rayon, and a Kubernetes pod walk into a bar. Nobody gets served. Even though Rust is known for its performance and safety, overlooking its…
Related to Rust
posthog.comWe've made some apples to oranges comparisons over the years. None have been so diametrically opposing than Postgres and DuckDB. However, that also…
Related to PostgreSQL
posthog.comPostHog's onboarding email flow is the thing I'm asked about most internally, and the thing I'm least confident in. It's been through nine major…
posthog.comReplay Vision is our AI layer over Session Replay . It points scanners at your session recordings, watches them, and summarizes the findings…
posthog.comWhen agent skills first came out, I thought they were silly. We are just casting magic spells now are we? Is that where we are? But over time, I…
posthog.comFrom the archive 2022
Like every role, product engineers have a set of essential tools for their work. Their need to gather insights, ideate, and deploy solutions…
Related to Product
posthog.comI really think we're on the verge of some of our best work through the next six months. Over the past year, we've started building more AI-powered…
Related to AI & ML
posthog.comWhat's the difference between context engineering and prompt engineering?
posthog.comYou've killed an agent mid-run by closing your laptop. Or watched three of them fight over your CPU while the fans took off (same). A cloud agent…
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