https://gist.github.com/691bf60c17da748c77de has some code I use for converting a group of tab delimited files into worksheets. It's taking quadratic time once the number of rows per workbook gets into the thousands, and virtually all of the time is taken in the Workbook#write command.
Is quadratic time a "known issue", am I doing something inefficient with the code, or should I provide more information?
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Quadratic scalability? [ reply ]