SolidJS vs React — When Performance Actually Matters

React's ecosystem is massive, but SolidJS delivers near-native speed with zero virtual DOM overhead. If you're building something fast, the choice is obvious.

Two Different Philosophies on State

React treats everything as a component that re-renders when state changes, which is intuitive but inefficient—you're constantly diffing a virtual DOM to figure out what actually changed. SolidJS says: why guess? It uses fine-grained reactivity where state updates trigger only the specific DOM nodes that depend on them, like a spreadsheet updating a single cell. This isn't just faster; it eliminates entire classes of bugs around unnecessary re-renders. React's model is "re-render everything and hope the diff is cheap," while SolidJS is "only touch what changed, period."

Where SolidJS Wins

SolidJS wins on raw performance and bundle size. Benchmarks show SolidJS apps running 2-5x faster in UI updates because there's no virtual DOM overhead—it compiles to direct DOM manipulations. Bundle sizes are smaller too: a basic SolidJS app starts around 5KB gzipped, while React with ReactDOM is about 40KB. The developer experience is surprisingly good: JSX syntax, hooks-like APIs (but actually reactive), and TypeScript support out of the box. It's like React without the performance baggage. Plus, it's free and open-source (MIT license), same as React, so no pricing surprises.

Where React Holds Its Own

React's ecosystem is unbeatable: thousands of libraries (like React Router, Redux, Material-UI), extensive documentation, and a massive job market. If you need a date picker, a chart library, or an auth solution, React has a package for it. Server-side rendering is mature with Next.js, while SolidJS's meta-frameworks (like SolidStart) are still evolving. React's stability is proven at scale—Facebook, Netflix, and Airbnb use it. For large teams or legacy codebases, React's predictability and tooling (React DevTools, testing libraries) are hard to beat.

The Gotcha: Switching Costs Are Real

Moving from React to SolidJS isn't a drop-in replacement. Syntax looks similar (JSX, hooks-style functions), but SolidJS's reactivity model means you can't just copy-paste components—state management works differently. For example, useState in React triggers re-renders; createSignal in SolidJS updates DOM directly. Tooling gaps exist: React has decades of IDE support, while SolidJS's VS Code extension is basic. If your team is all-in on React, retraining and refactoring could take months. Also, hiring is easier for React—good luck finding SolidJS experts on LinkedIn.

If You're Starting a Project Today

Pick SolidJS if you're building a performance-critical app (like a dashboard, real-time tool, or game UI) or a small-to-medium project where bundle size matters (e.g., a marketing site). Use React if you need a vast ecosystem (e.g., an e-commerce platform with many third-party integrations) or are working in a large team that values stability over speed. For greenfield projects, SolidJS is the smarter bet—you'll ship faster code with less bloat. But if you're already on React, don't rewrite everything; the payoff isn't worth the chaos.

What Most Comparisons Get Wrong

Most reviews treat this as a "React vs. new shiny thing" debate, but they miss the architectural shift. SolidJS isn't just "React but faster"—it's a fundamentally different approach that eliminates the virtual DOM entirely. React's performance issues aren't just about optimization; they're baked into the model. Also, people overhype SolidJS's learning curve—it's actually easier for beginners because there's no useMemo or useCallback nonsense to prevent re-renders. The real trade-off isn't complexity; it's ecosystem maturity. SolidJS is ready for production, but you might have to build your own date picker.

Quick Comparison

Factor	SolidJS	React
Performance	Near-native, no virtual DOM, 2-5x faster updates	Virtual DOM diffing, slower by default
Bundle Size	~5KB gzipped (core)	~40KB gzipped (React + ReactDOM)
Ecosystem	Growing but limited libraries	Massive (Next.js, Redux, thousands of packages)
Learning Curve	Easy if you know React, but reactivity is different	Well-documented, but hooks can be tricky
Server-Side Rendering	SolidStart (beta), less mature	Next.js (production-ready for years)
Pricing	Free, MIT license	Free, MIT license
TypeScript Support	Excellent, built-in	Excellent, but requires setup
Job Market	Niche, few dedicated roles	Huge, most frontend jobs list React

The Verdict

Use SolidJS if: You're building a performance-sensitive app (e.g., real-time dashboard, game UI) or care deeply about bundle size.

Use React if: You need a massive ecosystem (e.g., e-commerce with many integrations) or work in a large, risk-averse team.

Consider: Svelte—if you want a compiled framework like SolidJS but with a simpler syntax and more mature tooling, though it's less React-like.

SolidJS vs React: FAQ

Is SolidJS or React better?

SolidJS is the Nice Pick. SolidJS compiles to vanilla DOM updates with no runtime diffing, making apps 2-5x faster than React out of the box. You get React's developer experience without the performance tax.

When should you use SolidJS?

You're building a performance-sensitive app (e.g., real-time dashboard, game UI) or care deeply about bundle size.

When should you use React?

You need a massive ecosystem (e.g., e-commerce with many integrations) or work in a large, risk-averse team.

What's the main difference between SolidJS and React?

React's ecosystem is massive, but SolidJS delivers near-native speed with zero virtual DOM overhead. If you're building something fast, the choice is obvious.

How do SolidJS and React compare on performance?

SolidJS: Near-native, no virtual DOM, 2-5x faster updates. React: Virtual DOM diffing, slower by default. SolidJS wins here.

Are there alternatives to consider beyond SolidJS and React?

Svelte—if you want a compiled framework like SolidJS but with a simpler syntax and more mature tooling, though it's less React-like.

The Bottom Line

SolidJS wins

SolidJS compiles to vanilla DOM updates with no runtime diffing, making apps 2-5x faster than React out of the box. You get React's developer experience without the performance tax.

Related Comparisons