Introduce [Iain B. Findleton]'s great report of his gigabit-link observations.. See [Tcl Socket Performance]. Mention Microsoft explanation [http://support.microsoft.com/support/kb/articles/Q227/6/72.ASP] of its networking fault. Point to more general page on [Tcl Performance]. See also Todd Corams Idoms: Building High Performance Networking Servers using Tcl [http://www.maplefish.com/todd/tcl_net_idioms.html] Also, there's a dual consideration of networking impacts on Tcl performance; explain DNS faults and so on. [ns-2] This [http://dannyreviews.com/h/Network_Algorithmics.html] book review is likely to interest many readers. <> Performance