HTTP Tracer is useful: it listens to your (Windows) stack and monitors and logs all HTTP transactions and their speeds. Watch how long things take to download, what gets cached when, redirects and errors.
This is BrainLog, a blog by Dan Sanderson. Older entries, from October 1999 through September 2010, are preserved for posterity, but are no longer maintained. See the front page and newer entries.
April 17, 2001