Other respondents have suggested that you may be running out of memory, but that shouldn't normally cause a coredump. Coredumps tend to be quite specific to platform and perl version, so a useful starting point would be to show the output of perl -V.

Of the modules you are using, the most system-sensitive is actually Time::HiRes, so it might be worth checking that you have the latest version installed.

Since you presumably have a core file, the next useful thing to do would be to show it to a C-level debugger and ask for a backtrace. However the usefulness of the information may be limited if your perl isn't built with debugging symbols; in that case it might be worth trying to build a perl with debugging enabled and trying again.

Hugo