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Huge LBM lookup performance improvement on mapblock loading (#7195)
* Huge LBM lookup performance improvement on mapblock loading
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@ -254,23 +254,32 @@ void LBMManager::applyLBMs(ServerEnvironment *env, MapBlock *block, u32 stamp)
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MapNode n;
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content_t c;
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lbm_lookup_map::const_iterator it = getLBMsIntroducedAfter(stamp);
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for (pos.X = 0; pos.X < MAP_BLOCKSIZE; pos.X++)
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for (pos.Y = 0; pos.Y < MAP_BLOCKSIZE; pos.Y++)
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for (pos.Z = 0; pos.Z < MAP_BLOCKSIZE; pos.Z++)
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{
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n = block->getNodeNoEx(pos);
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c = n.getContent();
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for (LBMManager::lbm_lookup_map::const_iterator iit = it;
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iit != m_lbm_lookup.end(); ++iit) {
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const std::vector<LoadingBlockModifierDef *> *lbm_list =
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iit->second.lookup(c);
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for (; it != m_lbm_lookup.end(); ++it) {
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// Cache previous version to speedup lookup which has a very high performance
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// penalty on each call
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content_t previous_c{};
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std::vector<LoadingBlockModifierDef *> *lbm_list = nullptr;
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for (pos.X = 0; pos.X < MAP_BLOCKSIZE; pos.X++)
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for (pos.Y = 0; pos.Y < MAP_BLOCKSIZE; pos.Y++)
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for (pos.Z = 0; pos.Z < MAP_BLOCKSIZE; pos.Z++) {
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n = block->getNodeNoEx(pos);
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c = n.getContent();
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// If content_t are not matching perform an LBM lookup
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if (previous_c != c) {
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lbm_list = (std::vector<LoadingBlockModifierDef *> *)
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it->second.lookup(c);
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previous_c = c;
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}
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if (!lbm_list)
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continue;
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for (auto lbmdef : *lbm_list) {
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lbmdef->trigger(env, pos + pos_of_block, n);
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}
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}
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}
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}
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}
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/*
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