[dotNetRDF-Support] Reader/Writer performance in multithreaded setup

[Sebastien De G. <se...@ho...>]

Hi all, 
I'm writing an app that will act as a consolidator of Graphs.I do receive the graphs as RdfXml to local files or in memory strings.
Using a single thread I can achieve one file read or write within 1 or 2 seconds per file (600kb/file approx.).
Once I start to run 2/4 concurrent readers ( each with its own Graphs, Parser and Files) the read time per file gets multiplied by 10.
I can't understand where the 'contention' happends, I'm running this on Mono and dotnetrdf version 1.0.8.3533Apparently I do have these issues at the write side too, but can't be sure as the reading issue clutters the entire app for now.
Any idea or options i should search for for tuning the read/write ops ?
Thank you in advance.Kind Regards