Kleknev is a software development tool for measuring resource consumption during operations like software builds, which may span thousands of process invocations and hours of real time in a multiprocessor environment. It is currently experimental, incomplete, and available only by checkout from the Tsukurimashou Project's source control system.

Kleknev includes a wrapper which Make can invoke in place of the Bourne shell, and a reporting program which examines the wrapper's log file to discover how resources were used during the build. See this Web log posting for a more detailed description.