Massive Editor startup time slowdown when there are a bunch of files in the workspace not being analyzed

[jwren]

On my mac I noticed that the editor was taking what felt like a lot of time to load. Numbers tell the story:

dart2js dir loaded with no errors, co19 directory loaded with all contents marked as Don't Analyze, with 8 editors open on startup
Time_to_start_eclipse:2055
Time_to_start_ui:43151
Time_to_analysis_complete:43152
Time_to_indexing_complete:43153

Opened it again, this time though I had closed the editors: 0 editors were open in the Editor on startup- small speed-up in the numbers
Time_to_start_eclipse:1983
Time_to_start_ui:36998
Time_to_indexing_complete:36999

On this startup I had removed the co19 directory- significantly faster startup
Time_to_start_eclipse:1816
Time_to_start_ui:8000
Time_to_analysis_complete:8001
Time_to_indexing_complete:8002

Apparently if we have a bunch of files that we aren't even analyzing we are this much slower (29 seconds)?!

[jwren]

http://codereview.chromium.org/11029047/

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Added Fixed label.

[jwren]

Keerti followed up by with this CL to remove dead code: https://chromiumcodereview.appspot.com/11096015/

[clayberg]

Removed this from the M2 milestone.
Added this to the M1 milestone.