The package provides the means to suppress excessive (and usually unnecessary) tracing inside some particularly verbose parts of LaTeX (such as the font selection routines, or the calc package's parsing of expressions).

The package therefore redefines a number of key commands to turn off tracing while they execute (those the author finds most annoying and noisy). Since it potentially modifies the content of other packages, the package should be loaded last in a document's preamble.

The package is part of the tools bundle in the LaTeX required distribution.