We have noticed that Aspose.Email API is quite slower as compared to a commercial API, IndependentSoft.de. Here are our comparative results for reading an OST and PST files using both the APIs. The times are in milliseconds.
Reading OST by Aspose API: 16595 ms
Reading OST by IndependentSoft: 3942ms
Reading PST by Aspose API: 161849 ms
Reading PST by IndependentSoft: 5468 ms
Do you people have any benchmark testing of your API against some standard or 3rd party APIs available? This issue is causing alot of delay in processing the PST files and we request you to please look into this matter soon for fixing.