GoAccess is an open source real-time web log analyzer and interactive viewer that runs in a terminal in *nix systems. It provides fast and valuable HTTP statistics for system administrators that require a visual server report on the fly.

GoAccess can parse both of Apaches' log formats, the Common Log Format (CLF) and the Combined Log Format (XLF/ELF), including virtual host. It is possible to parse Nginx as well. (if configured with the standard Apache log format)

An excellent article explaining the benefits of prematurely flushing the first part of the web server's response, in particular the page headers. Discusses chunked encoding and content compression as well.

Beginning of a thread about apache which describes mod_deflate and chunked transfer encoding working together such that each chunked is individually gzipped. The thread doesn't resolve the question of whether this is allowed, but demonstrates that it works (and that apache/mod_deflate exhibits this behaviour by default).

A tool for viewing details of individual chunks sent back in the response from a webserver which is using the "Transfer-Encoding: chunked" feature of HTTP/1.1