0.11.6dev: improve startup time by caching the component activation "rules" and using a dict to speed up the checks.
Before, the n components were checked against the n' rules, where n and n' were often of the same magnitude, resulting in O(n^2^) behavior.
Profiling data for startup sequence hinted this could be a significant slowdown.
Authored by: cboos 2009-10-07
Parent: [r8643]
Child: [r8645]
