Scanning the Symbian SDK takes 10 minutes and is done each time project is loaded

When a new project is created or an old project is loaded, and the target of either project is one of the Symbian platform SDKs, Qt Creator takes over 10 minutes to scan that SDK and this operation is repeated every time the project is loaded.

To reproduce this issue, just configure Qt Creator to access a Symbian SDK, by installing Qt for Symbian libraries on top of a Symbian SDK, and accessing them from Qt Creator (http://blogs.forum.nokia.com//data/blogs/resources/300002/qt_symbian.png) . Then create a new project using the newly-created Symbian SDK target and scanning begins. Each time a new project is created or loaded, the Symbian SDK is scanned again, even though the same SDK has already been scanned for other projects. Each operation takes over 10 minutes, preventing the project from being built.

Update: Scanning the embedded Qt for Symbian Devices (Nokia Qt SDK) target also takes a long time and is repeated in the same situations as the native platform SDKs. However, the second scan is a lot faster than the first, so the same caching technique could be applied to the platform SDKs.

Update: Every time you switch targets on a project (e.g.: from Desktop to Symbian and back), Qt Creator re-scans the SDKs again, causing great delay.