Librespeed Download Slow __top__ -

LibreSpeed relies on a PHP backend to generate "garbage" data for the download test. If this process is slow, your results will be too.

Your web server (Apache or Nginx) must be tuned to handle the large data chunks LibreSpeed uses. librespeed download slow

: Running LibreSpeed through a reverse proxy like Traefik or Caddy can significantly throttle throughput. Tests show that while a direct HTTP connection can reach ~1 Gbps, switching to HTTPS via certain proxies can drop speeds to ~600 Mbps. LibreSpeed relies on a PHP backend to generate

One of the most frequent reasons for performance drops is the encryption overhead from . : Running LibreSpeed through a reverse proxy like

Sometimes the issue isn't the server—it's the device running the test. Download is very slow · Issue #494 · librespeed/speedtest

: On lower-end hardware (like a Raspberry Pi or old VM), the PHP function openssl_random_pseudo_bytes can max out the CPU, limiting the "speed" at which the server can actually send data.