Added default_init_allocator from http://stackoverflow.com/a/21028912… #3248
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…/273767 and adiosvec<T> type in helper::adiosType.h to be able to resize a vector without initialization. Changed BufferSTL and BP3/BP4/SST using adiosvec as well as in BP5 where vector<char> was used. It is much faster than vector<char> with Release build, but it is much slower with Debug build. Release build: $ ./bin/PerfVector 1024 Size = 1073741824 std::vector = 0.145024 helper::adiosvec = 5.73e-06 Malloc = 2e-08 Debug Build: $ ./bin/PerfVector 1024 Size = 1073741824 std::vector = 0.145616 helper::adiosvec = 5.48551 Malloc = 9.16e-06
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This whole thing is up for discussion. I don't remember right now where vector allocation was a measurable issue. |
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It is so slow in Debug mode, that these test take a minute to run. |
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…/273767 and adiosvec type in helper::adiosType.h to be able to resize a vector without initialization. Changed BufferSTL and BP3/BP4/SST using adiosvec as well as in BP5 where vector was used. It is much faster than vector with Release build, but it is much slower with Debug build.
Release build:
$ ./bin/PerfVector 1024
Size = 1073741824 std::vector = 0.145024 helper::adiosvec = 5.73e-06 Malloc = 2e-08
Debug Build:
$ ./bin/PerfVector 1024
Size = 1073741824 std::vector = 0.145616 helper::adiosvec = 5.48551 Malloc = 9.16e-06