Opened 17 years ago
Closed 17 years ago
#47 closed enhancement (fixed)
More optimized SDF reader handling of string properties and other performance enhancements
| Reported by: | badreddinekaroui | Owned by: | Badreddine Karoui |
|---|---|---|---|
| Priority: | minor | Milestone: | 3.3.0 |
| Component: | SDF Provider | Version: | 3.3.0 |
| Severity: | 3 | Keywords: | |
| Cc: | External ID: |
Description
This enhancement addresses 2 main issues: 1) A regular FDO client would use the class definition to discover and read the property values of a given class. As a result, after each ReadNext the properties are accessed in the order they added to the property definition collection of the class. One of the internal functions performs a linear search for every property. This change will eliminate the linear search by keeping a pointer to the last accessed property.
2) The second change implements a more efficient buffer cache for string properties and minimize memory re-allocation over the lifespan of the feature reader.
The above 2 changes have a significant performance improvement. For one of the test SDF files with 2 millions records the time to access all the records changed from ~140 sec to ~45 sec.
