If you're running out of dynamic resources such as RAM, etc. You may want to replace @garr by using a file on the hard drive as your output holder. It will act exactly the same but will relieve your system memory of the ever growing array @garr. You will ofcourse, have to then open it and get the contents for your final output, but again this is ONLY a thought with respect to conserving dynamic resources while the main concantenation/(sic) is proceeding. It is a redirect and nothing more.

The 50000 iterations would then only consume memory based on the first 2 arrays. Once all of the information was packed into the output file, you could then set there values to ''. The point seems to be to conserve the memory usage in RAM whilst running.

It's just a suggestion

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