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bgpd: Do not compare attr again.
`same_attr` has been computed and `hook_call(bgp_process)` (calling BMP module) would not change it. We could reuse the value to filter same attribute updates, avoiding an extra comparison. Signed-off-by: zyxwvu Shi <i@shiyc.cn>
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@ -3799,7 +3799,7 @@ int bgp_update(struct peer *peer, const struct prefix *p, uint32_t addpath_id,
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/* Same attribute comes in. */
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if (!CHECK_FLAG(pi->flags, BGP_PATH_REMOVED)
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&& attrhash_cmp(pi->attr, attr_new)
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&& same_attr
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&& (!has_valid_label
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|| memcmp(&(bgp_path_info_extra_get(pi))->label, label,
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num_labels * sizeof(mpls_label_t))
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