in reply to How can I compare two XML files with less memory

There is another module that does something similar: XML::SemanticDiff but it also uses XML::Parser, so it is likely to give you the same memory problems.

CountZero

A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James

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