Why Next.js 15 Is a Game Changer

Next.js 15 landed with a bang — and for us at Laughing Dev, it has already become the default for every new client project.

What is new?

1. Turbopack (stable) — dev builds are up to 76% faster.
2. React 19 support — Server Components, Server Actions and the new use() hook.
3. Partial Prerendering — mix static and dynamic on the same page.
4. Improved caching — cache is now opt-in rather than opt-out.

Real-world impact

On a recent SaaS build we saw:

• -42% initial JS bundle
• -60% Time-to-Interactive
• +18 Lighthouse points

Want these gains for your product? Talk to us.