# Cloudflare's 1.1.1.1 cache overhaul shows software wins by saving memory Source: TechNewsList (https://technewslist.com) Canonical URL: https://technewslist.com/en/article/cloudflare-dns-cache-memory-optimization-2026-08-28-morning Section: Software (https://technewslist.com/en/software) Author: TechNewsList Language: en Published: 2026-08-28T05:15:23.202+00:00 Updated: 2026-08-28T05:15:23.356476+00:00 > Cloudflare's 1.1.1.1 cache rewrite shows how software efficiency can unlock infrastructure gains that are invisible to users but huge at fleet scale. ## TL;DR - Cloudflare says five Rust-level optimizations cut 1.1.1.1 cache entry memory by 56%. - The company estimates the change frees about 100 TB of memory across the fleet. - That is a software story about data layout, not a flashy feature launch. - Infrastructure wins often come from boring engineering done exceptionally well. ## Key points - Category: Software. - Cloudflare is optimizing the DNS cache behind 1.1.1.1. - The article centers on Big Pineapple and memory layout changes. - The savings are measured at infrastructure scale, not just app scale. - Software differentiation can come from efficiency and systems design. - Rust-level changes are part of the story. - The result is a reminder that technical debt can also be technical leverage. # Cloudflare's 1.1.1.1 cache overhaul shows software wins by saving memory ## What happened Cloudflare published a deep engineering post explaining how it saved 100 terabytes of memory by optimizing the DNS cache behind 1.1.1.1. The company says five Rust-level memory optimizations cut per-entry memory by 56%, which is a huge gain at fleet scale. That is the kind of software story that looks modest until you do the math. One byte per entry becomes hundreds of gigabytes. A small layout change becomes a fleet-wide infrastructure event. Cloudflare is showing that software still wins, sometimes, by being deeply, almost obsessively efficient. ![Contextual editorial image for Cloudflare's 1.1.1.1 cache overhaul shows software wins by saving memory Cloudflare 1.1.1.1 Big Pineapple Rust DNS cache Cloudflare Blog Cloudflare Blog Cloudflare Radar technology news](https://www.cloudflare.com/img/learning/dns/what-is-1.1.1.1/query-speed.png) *Contextual visual selected for this TechPulse story.* The post is also a reminder that infrastructure products are now expected to justify themselves at scale. In 2026, a good software team is not just shipping features. It is tuning memory, latency, and data structures so the whole platform can run leaner. ## Why it matters This matters because efficiency is one of the most underrated forms of product advantage. If a vendor can cut memory usage by more than half on a critical service, that changes cost, headroom, and operational flexibility all at once. It also matters because Cloudflare is making a strategic point about software quality. Real infrastructure value often comes from engineering discipline, not a flashy launch page. That kind of work is hard to copy because it lives deep in the system. For the software category, this is a cleaner story than a lot of generic AI or app updates. It shows how mature software companies create leverage by making the stack smaller, faster, and less wasteful. ## Technical details The technical core is the DNS cache layout behind Big Pineapple, which supports 1.1.1.1 and other Cloudflare DNS services. When the cache stores hundreds of billions of entries, even tiny memory wins matter. Cloudflare says the optimizations were done at the Rust level, which suggests careful attention to data structures and memory layout. That kind of work is not glamorous, but it is powerful. The market tends to reward visible features, yet the real cost curve is often shaped by invisible engineering choices like field ordering, allocation patterns, and cache design. ![Contextual editorial image for Cloudflare's 1.1.1.1 cache overhaul shows software wins by saving memory Cloudflare 1.1.1.1 Big Pineapple Rust DNS cache Cloudflare Blog Cloudflare Blog Cloudflare Radar technology news](https://cf-assets.www.cloudflare.com/zkvhlag99gkb/2v48bmwuqspVfMCzQdLG6J/0c60992f372abca35bd7551d3c8a76eb/big-pineapple-intro-488FyR.png) *Contextual visual selected for this TechPulse story.* Cloudflare's explanation also shows how software architecture and infrastructure economics are now tightly linked. If you can reclaim 100 TB at fleet scale, you are not just improving a codebase. You are redesigning the economics of the service. ## Market / industry impact The market impact is that software teams still have room to compete on fundamentals. Even with all the current AI hype, companies that optimize memory, routing, and execution still create durable advantage. It also reinforces Cloudflare's brand as an infrastructure company that understands performance as a product, not an afterthought. That is valuable because customers do not just buy features; they buy confidence that the service will be fast, cheap, and reliable. The bigger industry lesson is that efficiency engineering is back in style. As AI and network workloads grow, the companies that control overhead most aggressively will have more room to innovate elsewhere. ## What to watch next Watch whether Cloudflare applies the same level of detail to other high-scale internal services. If it does, the company may keep turning infrastructure optimization into a signature advantage. Also watch whether peers in DNS, edge networking, and developer infrastructure start publishing similar deep dives. That would signal a renewed market emphasis on cost-per-request and bytes-per-entry discipline. The next proof point is whether customers translate the story into buying decisions. If they do, software efficiency will once again be treated as a strategic feature rather than a quiet engineering note. ## Sources - Cloudflare Blog, "How we saved 100 terabytes of memory by optimizing 1.1.1.1's DNS cache." - Cloudflare Blog homepage. - Cloudflare Radar, DNS queries to 1.1.1.1 from AS6171. Mentions: Cloudflare, 1.1.1.1, Big Pineapple, Rust, DNS cache, infrastructure, performance ## Sources - [Cloudflare Blog](https://blog.cloudflare.com/dns-cache-memory-optimization-1111/) - [Cloudflare Blog](https://blog.cloudflare.com/) - [Cloudflare Radar](https://radar.cloudflare.com/dns/as6171/)