I solved some tough IPC problems using the TCL event loop. A product that runs on several thousand machines across the US was designed around a set of distinct

I solved some tough IPC problems using the TCL event loop. A product that runs on several thousand machines across the US was designed around a set of distinct C++ processes communicating over sockets. Using the TCL event loop greatly simplified the design, improved performance and eliminated concurrency bugs present in the bespoke IPC code it replaced. It should have been written that way on day one but some programmers default to pounding out a bunch of spaghetti instead of learning about the tools at their disposal.