Prime 10.0 glacially slow processing large mixed data files

I just downloaded prime 10.0 and compared the run-time to process several large data files containing a mix of floating point numbers and strings with my previous 8.0 version.  While 8.0 is already much slower than legacy Mathcad, 10.0 took 50% longer  per file than 8.0:  181 secs vs 118 secs.   I had hoped the new version would have solved the execution time issue, but apparently not.  I will continue to use 8.0 and pine for the good old days of Mathcad.