xds: Use tracing GC in XdsDepManager #12132
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Reference counting doesn't release cycles, so swap to a tracing garbage collector. This greatly simplifies the code as well, as diffing is no longer necessary. (If vanilla reference counting was used, diffing wouldn't have been necessary either as you just increment all the new objects and decrement the old ones. But that doesn't work when use a set instead of an integer.)
kannanjgithub
approved these changes
Jun 6, 2025
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Reference counting doesn't release cycles, so swap to a tracing garbage collector. This greatly simplifies the code as well, as diffing is no longer necessary. (If vanilla reference counting was used, diffing wouldn't have been necessary either as you just increment all the new objects and decrement the old ones. But that doesn't work when use a set instead of an integer.)