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1e2aae8095
The idea is to avoid std::map lookup for each CellRef. Instead generate a sequence of added and removed RefNums into a vector then order them by RefNum using a stable sort that preserves relative order of elements with the same RefNum. RefIDs are stored in a different vector to avoid std::string move ctor calls when swapping elements while sorting. Reversed iteration over added and removed RefNums for each unique RefNum is an equivalent to what map-based algorithm produces. The main benefit from sorting a vector is a data locality that means less cache misses for each access. Reduces ESMStore::countRecords perf cycles by 25%. |
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| .. | ||
| mwbase | ||
| mwclass | ||
| mwdialogue | ||
| mwgui | ||
| mwinput | ||
| mwmechanics | ||
| mwphysics | ||
| mwrender | ||
| mwscript | ||
| mwsound | ||
| mwstate | ||
| mwworld | ||
| android_main.cpp | ||
| CMakeLists.txt | ||
| doc.hpp | ||
| engine.cpp | ||
| engine.hpp | ||
| main.cpp | ||