SourceDetectionConfig.doTempLocalBackground currently defaults to False, but we have reason to believe that this should be True by default:

• It suppresses junk in the wings of bright sources (e.g., compare without and with junk suppression).
• It makes the deblender much more robust: processing the HSC data of the VVDS and HectoMap fields, I was seeing about half out of a hundred or so tracts fail in the deblender (usually a single patch in the tract blowing out the memory usage); when I turned on the junk suppression and re-ran, I saw only one tract fail, and that appears to be a bona fide deblender bug.
• The only reason it's not activated by default is due to an oversight: the feature was introduced on the HSC side, where we intended to run with it on, but it was accidentally left disabled.

If you're not familiar with this parameter, see HSC-1353, where it was introduced (under a different name).

I propose to change the default behaviour to activate the junk suppression.