Developer Tools

jscpd

Last updated 2026-06-11 · benchmark measured 2026-08-09 — deterministic & reproducible

Copy/paste duplicate code detector supporting 223+ languages, rewritten in Rust.

Is jscpd production-ready?

Legit.Show scores jscpd 73 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on jscpd (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Discoverability; its weakest is Privacy. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

• Performance — 66/100
• Accessibility — 93/100
• Security — 45/100
• Privacy — 25/100
• Reliability — 90/100
• Standards — 89/100
• Discoverability — 100/100

What we measured

• Security headers present: X-Content-Type-Options, Referrer-Policy.
• No Content-Security-Policy and no HSTS.
• Served over HTTPS with a valid certificate.
• Real Lighthouse performance run — 227 ms to first byte.
• Returns a proper 404 for unknown routes.
• 2 of 3 sampled routes reachable.
• No privacy policy found.
• Sets cookies / loads scripts with no consent prompt.

Who built it

Andrey Kucherenko (@a_kucherenko)

Who it's for

Developers · DevOps engineers · Code quality teams · CI/CD pipelines · AI coding assistants

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