libcache - control caching of technology library data parsed from liberty files

yosys> help libcache
libcache {-enable|-disable|-purge} { -all | [path]... }
Controls the default and per path caching of liberty file data.
-enable    Enable caching.
-disable   Disable caching.
-purge     Reset cache setting and forget cached data.
This mode takes a list of paths as argument. If no paths are provided, this::

command does nothing. The -all option can be used to change the default cache
setting for -enable/-disable or to reset and forget about all paths.

By default caching is disabled.

    libcache -list

Displays the current cache settings and cached paths.