\fBgtk\-update\-icon\-cache\fR creates mmap()able cache files for icon themes\&.
.PP
If expects to be given the path to a icon theme directory, e\&.g\&. \fI/usr/share/icons/hicolor\fR, and writes a \fIicon\-theme\&.cache\fR containing cached information about the icons in the directory tree below the given directory\&.
.PP
GTK+ can use the cache files created by \fBgtk\-update\-icon\-cache\fR to avoid a lot of system call and disk seek overhead when the application starts\&. Since the format of the cache files allows them to be mmap()ed shared between multiple applications, the overall memory consumption is reduced as well\&.