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In a similar vein as bug 151053 is discussing for the JDT/Core, I was wondering whether completion and quick fix could be sped up by parallelizing computations. It looks like the following methods could be natural places for parallization: JavaCorrectionProcessor.collectCorrections(IInvocationContext, IProblemLocation[], Collection) ContentAssistProcessor.collectProposals(ITextViewer, int, IProgressMonitor, ContentAssistInvocationContext) In case parallizing within each category would be more effective alternatively CompletionProposalCategory.computeCompletionProposals(ContentAssistInvocationContext, String, SubProgressMonitor) could be a candidate. All three methods loop over some contributors which naively spoken might work independently. Only for correction collectors the protocol obviously requires some changes (regarding fields fLocations and fDescriptor, which cannot be shared among invocations). I haven't done any specific experiments at this stage. Basically asking whether this issue has been discussed before, and whether anyone would see it as a promising direction.
See also bug 251156.
(In reply to comment #1) > See also bug 251156. Thanks for the link. I just skimmed through bug 251156. Tyring to be perfectly clear, this is the major difference I'm seeing: I'm not speaking of pushing computation to the background, but of better utilizing multiple CPUs during computation. Users would still have to wait until all computations are done. My intention would be to come up with something much simpler than their patch. I saw that the guys in bug 251156 actually patched one of those very loops that I had looked at, too. Maybe we can benefit from their experience in this point. Also the issue of sorting is common to both bugs. Actually, parallelizing completion processors would stick to the design that each single processor should be very quick. The goal would only be to reduce the impact of having several/many processors. OTOH, I wasn't focussing on completion alone, but also corrections.
