In this chapter you have learned how to customize the Perl debugger, from using the alias command to changing the depth of a hash dump using HashDepth. You also learned to modify the DB::DB subroutine and replace the entire PERL5DB debugger library itself.
In the next chapter, you will learn various approaches for optimizing your Perl program. You will read about several performance hints and tips, which could be useful to make your Perl program go faster.
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