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Haris Volos, Zi Fan Tan, and Jianan Li developed a persistent gawk
prototype based on a fork of the gawk source. Advice from gawk
maintainer Arnold Robbins to me, which I forwarded to them, proved
very helpful. Robbins moreover implemented, documented, and tested
pm-gawk for the official version of gawk; along the way he suggested
numerous improvements for the pma memory allocator beneath
pm-gawk. Corinna Vinschen suggested other improvements to pma
and tested pm-gawk on Cygwin. Nelson H. F. Beebe provided access
to Solaris machines for testing. Robbins, Volos, Li, Tan, Jon
Bentley, and Hans Boehm reviewed drafts of this user manual and
provided useful feedback. Bentley suggested the min/max/mean example
in Examples, and also the exercise of making Kernighan & Pike’s
“Markov” script persistent. Volos provided and tested the advice on
tuning OS parameters in Virtual Memory and Big Data. Stan Park
provided insights about virtual memory, file systems, and utilities.