Here are several tips I learned from experience, hope you find it usefull: A. Check if Array/String inputs are empty, if they are, skip the step (for example, concatenate string vi and build array vi).
B. Use concatenate string and build array VIs sparsingly. C. Close unused references. D. when reading large files, read small chunk at a time. Other people may have additional tips. At the mean time, check the Application notes from Labview "Help >> Search Labview Bookshelf >> Application notes and white papers >> Labview performances and memory management" -Joe
