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c++ Programming Glossary: soaStructure of arrays and array of structures - performance difference http://stackoverflow.com/questions/11616941/structure-of-arrays-and-array-of-structures-performance-difference very bad performance for structure of arrays. For 50 units SoA's update is slightly faster than AoS.But then from 100 units.. slightly faster than AoS.But then from 100 units onwards SoA is slower than AoS. At 300 units SoA is almost twice as worse... 100 units onwards SoA is slower than AoS. At 300 units SoA is almost twice as worse. At 100K units SoA is 4x slower than..
Layout in memory of a struct. struct of arrays and array of structs in C/C++ http://stackoverflow.com/questions/8377667/layout-in-memory-of-a-struct-struct-of-arrays-and-array-of-structs-in-c-c to realign the struct to 8 bytes. The difference between SoA and AoS would be like this SoA double double double pad.. The difference between SoA and AoS would be like this SoA double double double pad int int int pad char char char.. int char Note that AoS pads within each struct. While SoA pads between the arrays. These have the following trade offs..
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