# Svelte vs React: source lines of code compared

The Svelte vs React comparison on OctoCounts shows side-by-side source line counts for sveltejs/svelte and facebook/react, counted with the same engine and analysis options on the dates shown in the methodology line: files, total lines, code lines, comment lines, blank lines, and per-language totals, pinned to the exact commits listed below.

As of 2026-09-20, sveltejs/svelte contains 100,505 total lines (58,797 code) across 506 files, while facebook/react contains 460,611 total lines (364,889 code) across 2,133 files as of 2026-09-19. facebook/react is about 6.2x the size of sveltejs/svelte by code lines. Code size is not code quality: a larger count only means more source material, not a better or worse project.

| Metric | [sveltejs/svelte](https://octocounts.com/github/sveltejs/svelte) | [facebook/react](https://octocounts.com/github/facebook/react) |
| --- | ---: | ---: |
| Files | 506 | 2,133 |
| Total lines | 100,505 | 460,611 |
| Code lines | 58,797 | 364,889 |
| Comment lines | 25,162 | 59,352 |
| Blank lines | 16,546 | 36,370 |
| Languages counted | 8 | 11 |

Top languages in sveltejs/svelte: JavaScript (78.0% of code), TypeScript (14.1% of code), YAML (6.1% of code). Top languages in facebook/react: JavaScript (63.5% of code), Rust (17.6% of code), TypeScript (16.4% of code). JavaScript, TypeScript, JSON appear in both top language lists; YAML, HTML appear only in sveltejs/svelte's top languages; Rust, CSS appear only in facebook/react's top languages.

Methodology: both counts come from cached OctoCounts reports generated with tokei. sveltejs/svelte was counted at ref main (commit 636eaaaa6f06) on 2026-09-20; facebook/react was counted at ref main (commit 59aff3e18cb5) on 2026-09-19. See the [counting methodology](https://octocounts.com/docs/methodology) for ignored directories and analysis options.
## About this comparison

sveltejs/svelte counts the Svelte monorepo: the compiler, runtime packages, tests, and documentation, while facebook/react counts the React monorepo — the React packages plus fixtures, documentation site content, and test infrastructure. Both counts therefore measure framework source trees, not applications built with them, and both archives were counted on the dates shown in the methodology line above.

Svelte's repository is organized around a compiler that does at build time much of the work other frameworks do at runtime, so the counted tree reads as a compiler project with runtime packages attached; React's counted tree reads as a runtime library with surrounding fixtures and docs — a structural difference visible in each report's file layout rather than in the totals alone.

Both trees carry a large share of documentation and test material, so part of each count exists to explain and protect the framework rather than to ship to apps.

_The counts say nothing about the size of what ships to a browser: Svelte moves work into build output and React ships a runtime subset, so neither repository's line count tracks bundle size, runtime behavior, or app performance._

Sources: [sveltejs/svelte repository (compiler and packages)](https://github.com/sveltejs/svelte) · [facebook/react repository structure (packages/ monorepo)](https://github.com/facebook/react). Statements verified 2026-09-16.

Evidence and next steps:

- [sveltejs/svelte SLOC report](https://octocounts.com/github/sveltejs/svelte)
- [facebook/react SLOC report](https://octocounts.com/github/facebook/react)
- [Compare sveltejs/svelte and facebook/react interactively](https://octocounts.com/compare?left=https%3A%2F%2Fgithub.com%2Fsveltejs%2Fsvelte&right=https%3A%2F%2Fgithub.com%2Ffacebook%2Freact)

Note: code size is not code quality. OctoCounts only reports reproducible line counts and makes no claim that either project is better.

## Compare FAQ

### Which has more lines of code, sveltejs/svelte or facebook/react?

facebook/react has more code: 364,889 code lines versus 58,797 for sveltejs/svelte, about 6.2x as much, based on cached OctoCounts reports as of 2026-09-20.

### Does more source lines of code mean more complexity?

Not necessarily. SLOC measures size, not complexity, quality, or maintainability. A larger codebase can mean more features, more generated or vendored code, more verbose language idioms, or more tests — none of which imply the code is harder to work with. Use SLOC to gauge the scale of what you'd be reading or maintaining, not as a quality signal for sveltejs/svelte, facebook/react, or any repository.

### How is this comparison calculated?

Methodology: both counts come from cached OctoCounts reports generated with tokei. sveltejs/svelte was counted at ref main (commit 636eaaaa6f06) on 2026-09-20; facebook/react was counted at ref main (commit 59aff3e18cb5) on 2026-09-19. See the counting methodology for ignored directories and analysis options.

### Can I compare a different branch, tag, or commit?

Yes. This page shows the default branch for each repository. Use the interactive comparison tool to pick any public GitHub repository, branch, tag, or commit SHA for both sides and get a fresh side-by-side report.

## Related OctoCounts pages

- [Interactive repository comparison](https://octocounts.com/compare)
- [Recently analyzed repositories](https://octocounts.com/recent)
- [Popular SLOC reports](https://octocounts.com/popular)
- [Trending GitHub repositories](https://octocounts.com/trending)
- [Hall of Monoliths](https://octocounts.com/hall-of-monoliths)
- [Original research: how filtering changes SLOC counts](https://octocounts.com/research)
- [GitHub SLOC counter guide](https://octocounts.com/docs/github-sloc-counter)
- [Counting methodology](https://octocounts.com/docs/methodology)
- [SLOC and code metrics glossary](https://octocounts.com/docs/glossary)
- [OctoCounts API docs](https://octocounts.com/docs/api)