SvelteKit

Version 2.49.4 · Measured 5/22/2026

Dev Time Performance

Prod Deps	Dev Deps	Dup. Deps	node_modules	node_modules (prod)	Dep Install Size	Graph
0	7	1	61.81MB	0.02MB	65.36MB	View

Metric	Avg	Min	Max
Install	1.22s	1.18s	1.28s
Cold Build	2.36s	2.24s	2.72s
Warm Build	2.28s	2.22s	2.36s

Build output size: 1.29MB

Duplicate Dependencies

1 duplicate dependency detected across this starter's node_modules.

View 1 duplicate dependency

is-reference

[duplicate dependency] is-reference has 2 installed versions:
1.2.1 via the following 1 package(s) @rollup/plugin-commonjs@28.0.9
3.0.3 via the following 1 package(s) svelte@5.46.3
💡 Suggestions
- Consider upgrading consuming packages as this may resolve this duplicate version.

Runtime Performance

SSR Performance

Framework	Ops/sec	Median Latency	Body Size	Duplication
Baseline HTML	856	1.198ms	96.81kb	1x
SvelteKit	440	2.217ms	183.55kb	2x

Methodology

Each framework renders a table of 1000 rows with two UUID columns
Mock HTTP requests bypass TCP overhead for accurate rendering measurement
Data is loaded asynchronously to simulate real-world data fetching
Duplication factor indicates how many times each UUID appears in the response (1x = optimal, 2x = includes hydration payload)
Benchmarks run for 10 seconds using tinybench
Astro, Nuxt, and SvelteKit handle Node.js HTTP requests natively. React Router, SolidStart, and TanStack Start use Web APIs internally, so benchmarks include the cost of their Node.js adapter layers (@react-router/node, h3, and srvx respectively)
Next.js defaults to React Server Components (RSC), a different rendering model than traditional SSR. To keep the comparison fair, Next.js uses "use client" to opt out of RSC and use traditional SSR + hydration like most of the other frameworks
Inspired by eknkc/ssr-benchmark

SPA Performance

Framework	First Paint	FCP	INP
SvelteKit	108.4ms	108.41ms	16.73ms

Methodology

Each framework renders a table of 1000 rows with two UUID columns
Measured using Lighthouse flow with Chromium via Puppeteer for accurate browser metrics
First Paint and First Contentful Paint are measured on initial navigation
Interaction to Next Paint is measured by clicking the first row's detail link
Benchmarks run 5 times and results are averaged
Next.js, TanStack Start, and React Router default to SSR with no per-route opt-out. Next.js wraps the SPA table in a dynamic import with ssr: false to prevent build-time prerendering. TanStack Start uses its built-in spa mode. React Router disables SSR entirely via ssr: false in its config. All other frameworks (Nuxt, SvelteKit, SolidStart, Astro) disable SSR per-route without a separate build.

MPA Performance

Framework	First Paint	FCP	INP
SvelteKit	72.6ms	72.66ms	0.48ms

Methodology

Each framework renders a table of 1000 rows with two UUID columns
Measured using Lighthouse flow with Chromium via Puppeteer for accurate browser metrics
First Paint and First Contentful Paint are measured on initial navigation
Interaction to Next Paint is measured by clicking the first row's detail link
Benchmarks run 5 times and results are averaged
Next.js, TanStack Start, and React Router default to SSR with no per-route opt-out. Next.js wraps the SPA table in a dynamic import with ssr: false to prevent build-time prerendering. TanStack Start uses its built-in spa mode. React Router disables SSR entirely via ssr: false in its config. All other frameworks (Nuxt, SvelteKit, SolidStart, Astro) disable SSR per-route without a separate build.