# Vercel — How we made global routing faster with Bloom filters

- Company: Vercel (vercel.com)
- Announced: 2025-09-19T13:00:00+00:00
- Category: capability-change
- Coverage: not counted
- Announcement: yes
- Group: announcements
- Source: https://vercel.com/blog/how-we-made-global-routing-faster-with-bloom-filters
- Record: https://forck.live/items/20816-how-we-made-global-routing-faster-with-bloom-filters
- Subject: v0 / AI SDK / AI Gateway

Vercel optimized its global routing service by replacing a slow JSON path-lookup file with a Bloom filter, reducing memory usage by 15%, improving TTFB from the 75th percentile and above by 10%, and cutting path lookup latency to nearly zero for websites with many static paths.

## Evidence

Verbatim from https://vercel.com/blog/how-we-made-global-routing-faster-with-bloom-filters:

> By replacing a slow JSON parsing operation with a Bloom filter, we brought path lookup latency down to nearly zero and improved performance for everyone.

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