explaingit

xiu2/cloudflarespeedtest

★ 26,703GoAudience · generalComplexity · 1/5ActiveLicenseSetup · easy

TLDR

A speed-testing tool that scans Cloudflare's global IP addresses and ranks them by latency and download speed, helping you find the fastest server for your location.

Mindmap

mindmap
  root((repo))
    What it does
      Scans Cloudflare IPs
      Measures latency
      Ranks by speed
    How to use
      Download executable
      Run the tool
      Get CSV results
    Who needs it
      End users
      Power users
      China-based users
    Tech stack
      Go language
      Network testing
      CSV export
    Platforms
      Windows
      Mac
      Linux

Things people build with this

USE CASE 1

Find the fastest Cloudflare IP address from your location to improve website loading speed.

USE CASE 2

Configure your network to route through a faster Cloudflare node instead of the default assigned one.

USE CASE 3

Diagnose and resolve poor Cloudflare performance issues, especially useful for users in regions with suboptimal default routing.

Tech stack

GoNetwork utilitiesCSV

Getting it running

Difficulty · easy Time to first run · 5min
Use it freely, but any project you distribute that includes this code must also be GPL-licensed and open source.

In plain English

CloudflareSpeedTest is a utility that finds the fastest Cloudflare server IP address for your specific location. Cloudflare is a global network (called a CDN, Content Delivery Network) that many websites use to serve their content faster. However, Cloudflare has thousands of IP addresses across the world, and the one automatically assigned to you might not be the quickest option from where you are. This tool runs a speed test across a large range of Cloudflare IP addresses, measures both the latency (how quickly each server responds) and download speed, then presents you with the top performers ranked by speed. The README is primarily in Chinese, reflecting its audience, users in China in particular often experience poor performance with the default Cloudflare IPs, so finding a faster one makes a meaningful difference. For a founder or developer who has websites behind Cloudflare, this tool isn't something you'd typically run yourself, it's designed for end users who want to manually configure their network settings to route through a faster Cloudflare node. This is more of a power-user networking tool than a standard developer dependency. It runs on Windows, Mac, and Linux, and the basic use is simple: download the executable, run it, wait a few minutes for the scan to complete, and get a list of the fastest IPs. The results are saved to a CSV file (a spreadsheet format) that you can open in any spreadsheet app. Built in Go, a programming language known for efficiency.

Copy-paste prompts

Prompt 1
How do I use CloudflareSpeedTest to find the fastest Cloudflare IP for my location?
Prompt 2
Show me how to interpret the CSV results from CloudflareSpeedTest and configure my network to use the fastest IP.
Prompt 3
I'm in China and getting slow Cloudflare speeds, walk me through running CloudflareSpeedTest and applying the results.
Prompt 4
What do the latency and download speed metrics in CloudflareSpeedTest results mean, and which should I prioritize?
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Generated 2026-05-18 · Model: sonnet-4-6 · Verify against the repo before relying on details.