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Version History

"Update benchmark results"
v9.5.1026/09/2026
"Update benchmark results"
v9.5.111/09/2026
"Init benchmark"
v8.7.506/01/2026

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Creation:2026-04-20Last update:2026-09-27

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Benchmark - Report

Name: I18n Performance Benchmark (Next.js)
Creator: Intlayer

Benchmark Bloom is a performance benchmarking suite that measures the real-world impact of i18n (internationalisation) libraries across multiple React frameworks and loading strategies.

Technology

Dynamic JSON loading

Lazy-loads translations at runtime

Scoped JSON (namespacing)

Per-page translation namespaces

What is this metric?

The total gzip-compressed size of the internationalisation library bundle. It only includes the provider and content retrieval logic after tree-shaking and minification.

Why is it important?

A smaller library size reduces the initial JavaScript payload, leading to faster download and execution times on the client.

View as

Find the detailed reports and technical documentation for each framework below:

Next.js Benchmark ReportCompare Next.js internationalisation (i18n) libraries like next-intl, next-i18next, and Intlayer. Detailed performance report on bundle size, leakage, and reactivity.

Next.js Benchmark Report

TanStack Start Benchmark ReportCompare TanStack Start internationalisation libraries like react-i18next, use-intl, and Intlayer. Detailed performance report on bundle size, leakage, and reactivity.

TanStack Start Benchmark Report

Vue Benchmark ReportCompare Vue internationalisation (i18n) libraries like vue-i18n, fluent-vue, Tolgee, and Intlayer. Detailed performance report on bundle size, leakage, and reactivity.

Vue Benchmark Report

Solid Benchmark ReportCompare Solid internationalisation (i18n) libraries like solid-primitives, solid-i18next, Tolgee, and Intlayer. Detailed performance report on bundle size, leakage, and reactivity.

Solid Benchmark Report

Svelte Benchmark ReportCompare Svelte internationalisation (i18n) libraries like svelte-i18n, Paraglide, Tolgee, and Intlayer. Detailed performance report on bundle size, leakage, and reactivity.

Svelte Benchmark Report

To understand where these libraries come from, read the history of JavaScript i18n.

The history of JavaScript i18nHow frontend i18n evolved from 2011 to 2026: release dates, architectural problems and key innovations across React, Vue, Next.js, Angular, Svelte and Solid.

The history of JavaScript i18n

v6 Next.js