🍿 What's Really Slowing Down Your Next.js App?


Hey Reader,

This week, we're putting your Next.js app under the microscope, what's slowing it down? This along with the latest news, can AI really debug complex React/Next.js bugs? How OpenClaw and Anthropic are enabling AI collaboration, 3 New Coding Models dropped and more.

Let's dive in!

​
🍿 Our Weekly Snack: What's Really Slowing Down Your Next.js App?

Have you ever wondered why your Next.js app feels sluggish or takes forever to load? 🐌 The new experimental Bundle Analyzer in Next.js 16.1 is here to help!

It's like an X-ray for your app, letting you see inside your JavaScript bundles.

Run the following command and explore your bundle breakdown in a sweet interactive tree map:

Here's an example of what the command will generate.

You can:

βœ”οΈ Spot the biggest, scariest modules slowing things down πŸ‘»

βœ”οΈ Track down sneaky dependencies bloating your app πŸ•΅οΈβ€β™€οΈ

βœ”οΈ Slim down your server code to speed up startup times ⚑

The Bundle Analyzer is your new best friend for catching performance bugs.

πŸš€ Latest Frontend News

Can AI actually debug complex React/Next.js bugs? The scorecard is humbling.

​TanStack AI New Updates: Send Images, Videos, Audio or any document and Multi-modality support

OpenClaw let multiple AIs work together on one task, now Anthropic ships that idea by default with Agent Teams.

Build Agents that speak to your React apps, with Tambo​

Vercel built an AI Engine Optimization pipeline to track whether coding agents are **actually** recommending their tools.

​Opus 4.6 Model dropped and 10 mins later GPT Codex 2.3 was also dropped, coincidence? Probably not.

Cursor just dropped Composer 1.5, it learns from mistakes 20Γ— more than Composer 1

E2E tests alone give you a false sense of security, here's why your frontend testing strategy needs more than just Playwright and prayers.


πŸ€” What did you think of the Newsletter?

​πŸ”₯ Love it!​

β€‹πŸ˜ It’s okay​

β€‹πŸ‘Ž Not good​

If you’ve published a blog post or shipped something, feel free to reply to this email and it comes straight to my inbox. I’m always looking for great community work to consider featuring.

All past newsletters can be found here. You can email me at me@kulkarniankita.com to advertise/sponsor the newsletter.

For those curious, I write all my emails using Convertkit.

See you next week!

Ankita Kulkarni

Join 9200+ subscribers reading by weekly personalized Newsletter that helps developers level up their skills through weekly Frontend and Leadership Snacks. You get a deep dive into a Tech topic, Actionable tips to excel in your career and a toolbox!

Read more from Ankita Kulkarni
git worktree

Hey Reader, A lot of you have been asking me how I’m able to stay so productive and get a lot of work done so I finally broke down my exact workflow and setup in a short video. 🍿 Our Weekly Snack: Run Multi Agents stress free with Claude Code Git work trees let you check out multiple branches at the same time each in its own folder all backed by the same repo. Instead of one working directory and constant branch switching, you get parallel workspaces. Each work tree has its own isolated...

skills vercel

Hey Reader, I just dropped a super exciting video that covers all 29 Common Next.js Mistakes that I have seen a lot of developers make (including senior developers). PRESENTED BY GRAPHITE Ship AI-generated code without getting buried in massive PRs. Stacking breaks large changes into small, logical PRs that your team can review and merge in parallel, making development faster and smoother. Graphite is the tool that makes stacking effortless. It, Organizes your work, Highlights clean diffs,...

Cleaner alternative to Next.js Serverless Functions

Hey Reader, Happy New Year! As we begin the year, I have dropped an exciting build for you on Building a Full Stack AI SaaS with Next.js 16, React, Hono.js, Tailwind that helps you find your AI Learning Partners based on your Learning Goals. Make sure to subscribe to my Youtube channel, my goal for this year is to cross 100k subscribers so help me make it happen πŸ’ͺ. The source code alongside cheatsheet is completely free! so enjoy and let me know what you think. PRESENTED BY CLERK Meet the...