SolidJS and React solve the same problem — building reactive UIs — with opposite mental models. React re-runs your component function on every state change and relies on a virtual DOM diff, plus, since the React Compiler, automatic memoization, to keep that cheap. SolidJS compiles your JSX into fine-grained reactive bindings: your component function runs once, and only the exact DOM nodes touched by a changed signal update afterward. In 2026 that difference is smaller in benchmarks than it used to be, but it still shapes how each framework feels to write and how it fails at scale.
What changed in 2026
- The React Compiler is stable and on by default in new Next.js and Vite-React templates, auto-memoizing components and hooks so manual
useMemo/useCallback are rarely needed anymore.
- Solid 2.0 shipped better SSR and islands support, closing much of the gap with React's Server Components for content-heavy sites.
- Signals went mainstream beyond Solid — Angular, Vue, Preact, and even Svelte 5's runes all converged on the same fine-grained reactivity idea Solid popularized.
- Solid's ecosystem grew but stayed small relative to React — SolidStart matured, but component libraries and hiring pools remain a fraction of React's.
- Bundle-size comparisons narrowed as React's compiler output got leaner, though Solid still ships a materially smaller runtime for equivalent apps.
The core difference
| Factor |
React |
SolidJS |
| Reactivity model |
Re-render + virtual DOM diff |
Fine-grained signals, direct DOM updates |
| Component function runs |
On state change (compiler reduces this) |
Once, ever |
| Memoization |
Automatic via React Compiler (2026) |
Not needed — updates are already granular |
| Bundle size |
Larger runtime |
Smaller runtime |
| SSR / islands |
Server Components, mature |
SolidStart, improving fast |
| Ecosystem size |
Enormous |
Small but growing |
| Learning curve |
Familiar to most engineers |
New mental model (signals, no re-renders) |
| Hiring pool |
Very large |
Small |
Where each wins
SolidJS wins on raw update performance and predictability — since only the DOM nodes tied to a changed signal re-run, there is no re-render tree to reason about, no stale-closure bugs from missed dependencies, and no need to explain useEffect dependency arrays to a new hire. It is a strong pick for performance-sensitive dashboards, editors, and any app with deeply nested, frequently updating state.
React wins on ecosystem gravity: component libraries, hiring, documentation, and AI-assistant training data all favor it by a wide margin. The 2026 React Compiler also closes much of Solid's historical performance advantage for typical CRUD apps, so the case for switching an existing React codebase to Solid purely for speed is weaker than it was two years ago.
Common mistakes
Rewriting a working React app for performance alone. Profile first — most React performance problems in 2026 are unnecessary client-side data fetching or bloated bundles, not re-render churn the compiler cannot already fix.
Bringing React habits into Solid unchanged. Destructuring props in Solid breaks reactivity, since props are accessed as function calls, not plain objects. Learn the signal model before you write real code.
Picking Solid for a large team without checking the hiring pool. A framework is also a staffing decision — confirm you can hire and onboard for it before committing a multi-year product to it.
Assuming virtual DOM means slow. React's virtual DOM diffing is fast in absolute terms; the performance gap that matters shows up in edge cases, like very large lists or high-frequency updates, not typical forms and pages.
FAQ
Is SolidJS faster than React in 2026?
On fine-grained, high-frequency updates, yes, measurably. For typical CRUD screens with the React Compiler enabled, the practical difference is small.
Does SolidJS use JSX?
Yes, the syntax looks like React, but it compiles to direct DOM instructions rather than a virtual DOM tree — the similarity is surface-level.
Is SolidJS production-ready?
Yes — it has been stable for years and powers production apps, but its ecosystem and hiring pool are much smaller than React's.
Should a new startup pick SolidJS over React?
Only if performance at scale is a known, specific requirement and the team is small enough to absorb the learning curve. Otherwise React's ecosystem usually wins by default.
Where to go next
If you are evaluating frontend approaches more broadly, HTMX explained in 2026 and HTMX vs React in 2026 cover the case for skipping a client framework entirely, and compiled vs interpreted languages in 2026 is a useful primer on the compilation ideas behind React's own compiler.