Your first problem is that your posted code doesn't compile. You have unbalanced parens and mismatched curlies:

if (grep { $$self{Matrix}[$row_index][$_] != $$other{Matrix}[$$mapping
+[$row_index]][$$mapping[$_]]); } (0..$#$mapping));
   (     {                                                            
+                            ^  } (             ))

[download]

What are the dimensions of your matrices and the mapping array?

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In reply to Re: Optimization Help by BrowserUk
in thread Optimization Help by jmmitc06

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