Identify slow code with Devel::Timer
How timing statements can help you pinpoint bottlenecks
Untangling subroutine attributes
How they work and how to implement your own custom versions
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Displaying the Git branch in the terminal prompt with and without Perl
Where am I again? No more typing “git branch”
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Fixing a sluggish Linux after suspend-resume
The cpupower program can resolve throttled machines
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