# Performance Zen

> Web Performance, Climate Change, and Assorted Rantings

## Main links

- [Home](https://performancezen.com/): Website home page
- [Sitemap](https://performancezen.com/sitemap.xml): XML sitemap
- [RSS](https://performancezen.com/feed/): Latest updates feed

## Posts

- [Enterprise Shield — ASN Blocklist – 2026 08 25](https://performancezen.com/llm/post/enterprise-shield-asn-blocklist-2026-08-25.md): Updated 2026-08-25. Canonical URL: https://performancezen.com/2026/08/25/enterprise-shield-asn-blocklist-2026-08-25/

- [Enterprise Shield: Automated Penalty Box](https://performancezen.com/llm/post/enterprise-shield-automated-penalty-box.md): Updated 2026-08-25. Canonical URL: https://performancezen.com/2026/08/25/enterprise-shield-automated-penalty-box/

- [Enterprise Shield – Top Offenders – 2026-07-22](https://performancezen.com/llm/post/enterprise-shield-top-offenders-2026-07-22.md): Updated 2026-07-23. Canonical URL: https://performancezen.com/2026/07/23/enterprise-shield-top-offenders-2026-07-22/

- [Create your own Google CrUX Benchmark Report](https://performancezen.com/llm/post/create-your-own-google-crux-benchmark-report.md): Updated 2026-07-15. Canonical URL: https://performancezen.com/2026/07/15/create-your-own-google-crux-benchmark-report/

- [Enterprise Shield – Top Offenders – 2026-07-13](https://performancezen.com/llm/post/enterprise-shield-top-offenders-2026-07-13.md): Updated 2026-07-13. Canonical URL: https://performancezen.com/2026/07/13/enterprise-shield-top-offenders-2026-07-13/

- [Retiring an old friend](https://performancezen.com/llm/post/retiring-an-old-friend.md): Updated 2026-07-13. Canonical URL: https://performancezen.com/2026/07/13/retiring-an-old-friend/

- [Enterprise Shield – Top Offenders – 2026-06-19](https://performancezen.com/llm/post/enterprise-shield-top-offenders-2026-06-19.md): Updated 2026-06-19. Canonical URL: https://performancezen.com/2026/06/19/enterprise-shield-top-offenders-2026-06-19/

- [Enterprise Shield – Top Offenders – 2026-06-12](https://performancezen.com/llm/post/enterprise-shield-top-offenders-2026-06-12.md): Updated 2026-06-13. Canonical URL: https://performancezen.com/2026/06/13/enterprise-shield-top-offenders-2026-06-12/

- [Enterprise Shield – Surge Analysis](https://performancezen.com/llm/post/enterprise-shield-surge-analysis.md): Updated 2026-06-10. Canonical URL: https://performancezen.com/2026/06/10/enterprise-shield-surge-analysis/

- [Enterprise Shield – The Evolution – Part 2: The System](https://performancezen.com/llm/post/enterprise-shield-the-evolution-part-2.md): Updated 2026-06-05. Canonical URL: https://performancezen.com/2026/06/05/enterprise-shield-the-evolution-part-2/

- [Enterprise Shield – The Evolution – Part 1: What & Why](https://performancezen.com/llm/post/enterprise-shield-the-evolution-part-1.md): Updated 2026-06-05. Canonical URL: https://performancezen.com/2026/06/04/enterprise-shield-the-evolution-part-1/

- [Current ASN Block List](https://performancezen.com/llm/post/current-asn-block-list.md): Updated 2026-05-27. Canonical URL: https://performancezen.com/2026/05/27/current-asn-block-list/

- [Peak Bots: Is your site ready?](https://performancezen.com/llm/post/peak-bots-is-your-site-ready.md): Updated 2026-05-11. Canonical URL: https://performancezen.com/2026/05/11/peak-bots-is-your-site-ready/

- [On 22 years of posts](https://performancezen.com/llm/post/on-22-years-of-posts.md): Updated 2026-05-09. Canonical URL: https://performancezen.com/2026/05/09/on-22-years-of-posts/

- [Enterprise Shield: The flow and general process](https://performancezen.com/llm/post/enterprise-shield-the-flow-and-general-process.md): Updated 2026-05-08. Canonical URL: https://performancezen.com/2026/05/08/enterprise-shield-the-flow-and-general-process/

- [Tuning Traffic: Aggressive Rewrite Rules](https://performancezen.com/llm/post/tuning-traffic-aggressive-rewrite-rules.md): Updated 2026-06-13. Canonical URL: https://performancezen.com/2026/05/07/tuning-traffic-aggressive-rewrite-rules/

- [Slowing The Flood: Firewall Tuning – Month 1](https://performancezen.com/llm/post/slowing-the-flood-firewall-tuning-month-1.md): Updated 2026-05-07. Canonical URL: https://performancezen.com/2026/05/07/slowing-the-flood-firewall-tuning-month-1/

- [Apache and 403 Responses — HTTP/2.0 v. HTTP1.1](https://performancezen.com/llm/post/apache-and-403-responses-http-2-0-v-http1-1.md): Updated 2026-05-06. Canonical URL: https://performancezen.com/2026/05/06/apache-and-403-responses-http-2-0-v-http1-1/

- [Attack Vector: Turkish ASNs](https://performancezen.com/llm/post/attack-vector-turkish-asns.md): Updated 2026-05-01. Canonical URL: https://performancezen.com/2026/05/01/attack-vector-turkish-asns/

- [Enterprise Shield on Dinosaur Hardware](https://performancezen.com/llm/post/enterprise-shield-on-dinosaur-hardware.md): Updated 2026-05-07. Canonical URL: https://performancezen.com/2026/04/02/enterprise-shield-on-dinosaur-hardware/

- [The overuse of no-store in Cache-Control Headers](https://performancezen.com/llm/post/the-overuse-of-no-store-in-cache-control-headers.md): Updated 2025-11-21. Canonical URL: https://performancezen.com/2025/11/21/the-overuse-of-no-store-in-cache-control-headers/

- [Highest Global Average Temperature – 2023-07-06](https://performancezen.com/llm/post/highest-global-average-temperature-2023-07-06.md): Updated 2023-11-15. Canonical URL: https://performancezen.com/2023/07/08/highest-global-average-temperature-2023-07-06/

- [My First Patagonia Catalog](https://performancezen.com/llm/post/my-first-patagonia-catalog.md): Updated 2022-04-29. Canonical URL: https://performancezen.com/2022/04/29/my-first-patagonia-catalog/

- [Link Fixing and the Wayback Machine](https://performancezen.com/llm/post/link-fixing-and-the-wayback-machine.md): Updated 2022-04-29. Canonical URL: https://performancezen.com/2022/04/29/link-fixing-and-the-wayback-machine/

- [Web Caching and Old Age](https://performancezen.com/llm/post/web-caching-and-old-age.md): Updated 2022-04-28. Canonical URL: https://performancezen.com/2022/04/22/web-caching-and-old-age/

- [Covid Daily Stats and the Question of China](https://performancezen.com/llm/post/covid-daily-stats-and-the-question-of-china.md): Updated 2022-05-09. Canonical URL: https://performancezen.com/2022/04/20/covid-daily-stats-and-the-question-of-china/

- [Hüsker Dü’s Newest Industry and The World Today](https://performancezen.com/llm/post/husker-dus-newest-industry-and-the-world-today.md): Updated 2022-04-14. Canonical URL: https://performancezen.com/2022/04/14/husker-dus-newest-industry-and-the-world-today/

- [Old Hardware is Still Good Hardware](https://performancezen.com/llm/post/old-hardware-is-still-good-hardware.md): Updated 2022-04-14. Canonical URL: https://performancezen.com/2022/04/12/old-hardware-is-still-good-hardware/

- [Core Web Vitals and Web Performance Strategy: A Reality Check](https://performancezen.com/llm/post/core-web-vitals-and-web-performance-strategy-a-reality-check.md): Updated 2026-05-07. Canonical URL: https://performancezen.com/2022/04/01/core-web-vitals-and-web-performance-strategy-a-reality-check/

- [The Performance Implications of Android Dominance](https://performancezen.com/llm/post/the-performance-implications-of-android-dominance.md): Updated 2022-05-10. Canonical URL: https://performancezen.com/2022/04/01/the-performance-implications-of-android-dominance/