The loading and parsing of package classes takes considerable time during bootstrapping. As the information there is just needed in rare cases it should be moved into the composer.json file extra section.
[TASK] Improve performance of Bootstrap/PackageManager
This patch is a combined patch which tries to address
the findings from the Bootstrap/PackageManager/ClassLoader
Reviewed-by: Ernesto Baschny
Tested-by: Ernesto Baschny