CloudflareSpeedTest is a command-line tool that benchmarks Cloudflare CDN performance to identify the fastest IP addresses for a given location.
Many websites outside China use Cloudflare CDN, but the IP addresses assigned to mainland Chinese users often suffer from high latency, packet loss, and slow speeds. While Cloudflare publishes all its IP ranges publicly, manually testing hundreds of IPs to find the best ones is impractical. This tool automates that process by testing latency and download speed across Cloudflare's IP space, supporting both IPv4 and IPv6 addresses. The tool can also benchmark other CDNs and websites with multiple resolving IPs, though download test URLs must be provided separately.
The tool suits anyone in regions where Cloudflare's default IP assignments perform poorly and who wants to optimize their connection to Cloudflare-backed services. It works on Windows, Linux, and macOS, with precompiled binaries available for download. The README includes a warning that Cloudflare explicitly prohibits proxy usage through its CDN, and users relying on proxied connections assume their own risk. The tool is straightforward to use: download the executable, run it, and wait for testing to complete.
The project maintains active engagement with users through discussions and issue tracking, addressing questions about testing accuracy and platform-specific usage. Development includes support across multiple operating systems and architectures, with documentation covering Windows, Linux, and macOS installation methods. The maintainer has published related open-source projects in adjacent areas, suggesting sustained involvement in network optimization tooling.
