--- /dev/null
+Threadpool MPM:
+This is an experimental variant of the standard worker MPM.
+Rather than queuing connections like the worker MPM, the threadpool
+MPM queues idle worker threads and hands each accepted connection
+to the next available worker.
+
+The threadpool MPM can't match the performance of the worker MPM
+in benchmark testing. As of 2.0.39, some of the key load-throtting
+concepts from the threadpool MPM have been incorporated into the
+worker MPM. The threadpool code is useful primarily as a research
+platform; for general-purpose use, and for any production environments,
+use worker instead.