That is exactly what I needed. The final piece of the puzzle to help me understand how to effectively use MCE in my script. It is now faster than ever, doesn't use any shared variables, and the parallelization is completely handled by MCE. It just took me a bit to realize I needed to remove my signal handlers. The relays must use SIGINT or something. It even takes my input file handle and does the chunked reading for me, and works with IPC file handles from the gzip command. The relay blocks as needed to keep output in sequence. Thanks a lot!

In reply to Re^6: shared scalar freed early by chris212
in thread shared scalar freed early by chris212

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