Edit Question - KnowledgeHub

Title Body

I've just been really surprised by how slow printf from F# is. I have a number of C# programs that process large data files and write out a number of CSV files. I originally started by using fprintf writer "%s,%d,%f,%f,%f,%s" thinking that that would be simple and reasonably efficient. However after a while I was getting a bit fed up with waiting for the files to process. (I've got 4gb XML files to go through and write out entries from them.). When I ran my applications through a profiler, I was amazed to see printf as being one of the really slow methods. I changed the code to not use printf and now performance is so much better. Printf performance was killing my overall application performance. To give an example, my original code is: fprintf sectorWriter "\"%s\",%f,%f,%d,%d,\"%s\",\"%s\",\"%s\",%d,%d,%d,%d,\"%s\",%d,%d,%d,%d,%s,%d" sector.Label sector.Longitude sector.Latitude sector.RNCId sector.CellId siteName sector.Switch sector.Technology (int sector.Azimuth) sector.PrimaryScramblingCode (int sector.FrequencyBand) (int sector.Height) sector.PatternName (int sector.Beamwidth) (int sector.ElectricalTilt) (int sector.MechanicalTilt) (int (sector.ElectricalTilt + sector.MechanicalTilt)) sector.SectorType (int sector.Radius) And I've changed it to be the following seq { yield sector.Label; yield string sector.Longitude; yield string sector.Latitude; yield string sector.RNCId; yield string sector.CellId; yield siteName; yield sector.Switch; yield sector.Technology; yield string (int sector.Azimuth); yield string sector.PrimaryScramblingCode; yield string (int sector.FrequencyBand); yield string (int sector.Height); yield sector.PatternName; yield string (int sector.Beamwidth); yield string (int sector.ElectricalTilt); yield string (int sector.MechanicalTilt); yield string (int (sector.ElectricalTilt + sector.MechanicalTilt))

Tags (comma-separated) Cancel