When should you prefer perlguts overview, and when should you avoid it?

        // Example of using perlguts in a C extension
        #include "EXTERN.h"
        #include "perl.h"
        #include "XSUB.h"

        void example_function() {
            SV *scalar = newSViv(2); // Create a new scalar
            // Use Perl internals to manipulate this scalar
            SvSETIV(scalar, 42); // Set the value of the scalar
        }
    

In general, you should prefer perlguts when:

• You require low-level performance optimizations that cannot be achieved through standard Perl functions.
• You are creating XS modules that interface C code with Perl.

On the other hand, you should avoid perlguts when:

• Your project can be implemented purely in Perl without sacrificing performance.
• You're not familiar with C programming or the intricacies of Perl's internal architecture.