Edge HTML Cache for Bitrix: Low TTFB, No Warm-Ups

Why TTFB matters

When a Bitrix page is generated on every request, time to first byte (TTFB) climbs. Even a fraction of a second of delay hurts conversion and Core Web Vitals. An edge HTML cache fixes this: the HTML is served from the nearest node, with no PHP and no database in the path.

How the edge layer works

The architecture looks like this: User ↔ Edge ↔ Origin (Bitrix).

1. The user hits the site.
2. The edge server checks the cache and returns ready HTML immediately (a hit).
3. If the page is stale, a grace period kicks in and the new content is refreshed in the background via stale-while-revalidate.
4. Bitrix only takes load when something changes, and users always get a fast response.

What it uses

• Reverse proxy (Nginx, Varnish, Fastly, Cloudflare): holds the HTML cache at the network edge.
• Grace / stale-while-revalidate: the balance between freshness and speed.
• Tag-based purge: only the relevant part of the cache is refreshed (a product, a category, a banner).

Benefits

• TTFB < 100 ms: HTML is served instantly.
• No warm-ups: refresh happens in the background.
• High hit ratio: minimal calls back to Bitrix.
• Stable under traffic spikes.
• Compatible with your existing Bitrix structure.

Where it fits

• online stores with a large catalog and dynamic promotions;
• corporate portals with international traffic;
• marketplaces and promo sites where response time matters.

Bottom line

An edge HTML cache is an architectural layer that lets Bitrix projects run faster and hold up under load. No manual warm-ups, no loss of freshness, and a consistently low TTFB.