https://gcc.gnu.org/bugzilla/show_bug.cgi?id=12245
--- Comment #68 from Frank Ch. Eigler <fche at redhat dot com> --- (In reply to Jakub Jelinek from comment #67) > Are the values completely random or are there big chunks with the same > values? I'd suspect pretty random, considering that gzip of the generated source code compresses by only 80%. In the case of the systemtap example, it's approximately a byte dump of the .debug_line section, which is relatively efficiently encoded, ergo incompressible.