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## Problem Some feature flags are used heavily on the critical path and we want the "get feature flag" operation as cheap as possible. ## Summary of changes Add a `test_remote_size_flag` as an example of such flags. In the future, we can use macro to generate all those fields. The flag is updated in the housekeeping loop. The retrieval of the flag is simply reading an atomic flag. --------- Signed-off-by: Alex Chi Z <chi@neon.tech>