☝( ◠‿◠ )☝ weeklyfoo 159 is here!

● weeklyfoo

Issue #159 · 19 Oct 2026 · 40 links

The web dev week,
in one coffee.

Everything worth your attention from the past seven days, in 4 categories. Read it Monday, get back to building.

Read it first

Three production investigations, a latency regression, a memory leak and a kernel-level hang, show how to steer coding agents through unfamiliar systems by separating facts from hypotheses and comparing failures with a control

Cindy Sridharan · ai, agents, debugging · 1 min read

Deep walkthrough of drafting several tokens cheaply and verifying them in one target-model pass, with acceptance and speedup formulas, EAGLE-3, multi-token prediction and diffusion drafters

astralord · ai, llm, performance · 66 min read

A MonetDB count-distinct query saturates an NVMe drive because Linux flushes dirty pages from memory-mapped scratch files, and moving them to tmpfs cuts runtime from 73 minutes to 97 seconds

swingbit · databases, linux, performance · 11 min read

In a 2,000-row microbenchmark inlining alone slows rendering from 444 ms to 1,038 ms by removing per-row caches, while adding block DOM updates cuts it to 164 ms

Jimmy Miller · react, performance, compiler · 30 min read

Google's DevSite reused an OAuth secret from a readable Flask session cookie as the signing key, letting forged sessions reach unsafe pickle deserialization

Simon Koeck · security, bug-bounty · 5 min read

Adding workers to a Postgres-based queue made it slower because of per-job SAVEPOINTs, and claiming jobs with a lease fixed it

Rory Malcolm · postgres, queues, performance · 18 min read

Scott Helme · security, tls · 7 min read

Yoav Weiss · ai, agents, web · 10 min read

Ryan Dahl · deno, cloudflare, javascript · 5 min read

Jarred Sumner · bun, typescript · 70 min read

TanStack · react, solid, framework · 24 min read

Chrome for Developers · css, html, chrome · 15 min read

Anthropic · git, infrastructure, monorepo · 22 min read

Cloudflare · data, performance, infrastructure · 30 min read

Martin Fowler · ai, agents, engineering · 23 min read

Google DeepMind · ai, llm, google · 23 min read

PgBouncer · postgres, security · 2 min read

Meta · ai, llm, open-weights · 4 min read

Supabase's open source schema diff engine that turns two Postgres databases into an ordered migration covering RLS policies, grants and domains

Supabase · postgres, migrations, open-source

Caches command output so repeated runs return instantly

alex0ptr · cli, caching

Embeddable, scriptable IMAP server for testing email clients with in-memory mailboxes and scripted faults, driven from tests or a REST API

Postal Systems · email, testing

REA REA · ai, agents, reverse-engineering

OpenCode 2.0 OpenCode · ai, agents, cli

Shaders Simon Le Marchant · webgpu, shaders, open-source

Tamagui 3 Nate Wienert · react, react-native, ui

Partytown 1.0 Builder.io · performance, javascript

AI Policy ai-policy.dev · ai, open-source

Bifrost Maxim · ai, gateway, open-source

CSS Text Effects Colorion · css, animation, typography

pg_disorder viralpraxis · postgres, testing

reseter.css 3.0 Krish Gupta · css, reset

caniname Bramus van Damme · cli, npm

p-queue 10 Sindre Sorhus · javascript, nodejs, async

Void Cloudflare · cloudflare, vite, deployment

SPACE Perplexity · ai, agents, sandbox

Restroom Archive · fun, 3d · 11 min read

Cheng Lou · fun, javascript, ai · 1 min read

Five teams running 90+ microservices at the Port of Rotterdam use DDD and event storming to move back to modular monoliths

Mario Klaver · architecture, microservices, devoxx

Alan Bateman, Viktor Klang · java, concurrency, devoxx

NodeConf EU · nodejs, conference, performance

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