pb/planner: switch _ntp2size to absl::btree_map #11740
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This particular map can get large-ish with lots of partitions. Switch to btree_map as this is not a hot-path.
ztlpn
approved these changes
Jun 28, 2023
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this is not a hot-path.
Actually IIRC operations with this map amount to a sizable chunk of planning runtime (we can check with bench tests). Anyway, we can correct any performance hit from switching to btree_map by using some integer (such as raft group id) as a key for this map :)
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Failures (unrelated).
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This particular map can get large-ish with lots of partitions. Switch to btree_map as this is not a hot-path.
Fixes #11677
Backports Required
Release Notes