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[eclipse-pmc] API Request: additional method for caching changes
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The context service fires one event for each context that is added or
removed, even when a number of changes were all caused by the same source
change event, like a workbench window activation. This is currently
causing way too many binding re-evaluations.
This is API because the ContextManager is in org.eclipse.core.commands. I
want to add ContextManager#setEventCaching(boolean).
GOALS/BENEFITS:
Reduce churn in the system by firing one event for all context changes
occurring because of one source change.
CORRESPONDING BUG:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=179036
RISKS:
This is low risk, as it's a new method to allow batching of change events.
PERFORMANCE IMPACTS:
This will improve the context updates incurred because of Shell activation
from around 500ms to about 80ms. It will also reduce the amount of caching
the in the BindingManager.
