blockchain: incremental long term block weight cache
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@ -1280,6 +1280,8 @@ void Blockchain::get_long_term_block_weights(std::vector<uint64_t>& weights, uin
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LOG_PRINT_L3("Blockchain::" << __func__);
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CRITICAL_REGION_LOCAL(m_blockchain_lock);
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PERF_TIMER(get_long_term_block_weights);
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if (count == 0)
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return;
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@ -1295,10 +1297,30 @@ void Blockchain::get_long_term_block_weights(std::vector<uint64_t>& weights, uin
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if (cached)
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{
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MTRACE("requesting " << count << " from " << start_height << ", cached");
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weights = m_long_term_block_weights_cache;
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return;
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}
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// in the vast majority of uncached cases, most is still cached,
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// as we just move the window one block up:
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if (tip_height > 0 && count == m_long_term_block_weights_cache.size() && tip_height < blockchain_height)
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{
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crypto::hash old_tip_hash = m_db->get_block_hash_from_height(tip_height - 1);
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if (old_tip_hash == m_long_term_block_weights_cache_tip_hash)
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{
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weights = m_long_term_block_weights_cache;
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for (size_t i = 1; i < weights.size(); ++i)
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weights[i - 1] = weights[i];
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MTRACE("requesting " << count << " from " << start_height << ", incremental");
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weights.back() = m_db->get_block_long_term_weight(tip_height);
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m_long_term_block_weights_cache = weights;
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m_long_term_block_weights_cache_tip_hash = tip_hash;
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return;
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}
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}
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MTRACE("requesting " << count << " from " << start_height << ", uncached");
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weights = m_db->get_long_term_block_weights(start_height, count);
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m_long_term_block_weights_cache = weights;
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m_long_term_block_weights_cache_tip_hash = tip_hash;
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