---
title: "Blog — warmup.rocks"
description: "Deep dives on CDN caching, cache warming, hit ratios, TTFB and web performance — from the team behind warmup.rocks."
canonical: https://warmup.rocks/blog/
---

[Fundamentals

## What is cache warming? A practical guide

Caches only help when they're full — and they start empty. How cache warming works, which caches can be warmed, and when it's worth automating.

July 2026 · 8 min read](https://warmup.rocks/blog/what-is-cache-warming) [Cloudflare

## Cloudflare cache warming: why one server can't preload 300+ colos

Cloudflare caches per data center. A warming crawler in one region fills exactly one of them. What actually works — including Workers Cache and Tiered Cache.

July 2026 · 9 min read](https://warmup.rocks/blog/cloudflare-cache-warming) [Metrics

## Cache hit ratio: how to measure it and how to raise it

The single most useful CDN metric, the difference between request and byte hit ratio, and seven concrete levers to push yours up.

July 2026 · 7 min read](https://warmup.rocks/blog/cache-hit-ratio) [Core Web Vitals

## Time to First Byte: the floor under all your Core Web Vitals

LCP can't be fast if the first byte is slow. What TTFB is made of, what "good" looks like, and why edge caching is the biggest lever.

July 2026 · 8 min read](https://warmup.rocks/blog/time-to-first-byte)