As a systems guy, i would always choose awk, if possible.
Not perhaps for parsing xml...
Examine the strace -c <code> reports :
For awk :
And for ruby :
The difference will not be noticed on a system when parsing one file.
But in a situation where you need to parse tens of thousands ...
Possibly the ruby code can be written to do it better, but doubtful it will ever surpass awk code in performance.
This is to say if two ideal coders write a program in ruby and awk to do one thing best it can and start forking it
So, to conclude, in my opinion higher level languages are to be used in situations where your program needs many libraries to ease up the job - connect to multiple API endpoints, databases, versioning systems, complex math and such.
You could do all that in awk, but tremendous effort will be required and will beat the propose of short programs which do one thing quick and efficient.
This is just my rant
Regards
Peasant.
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