Currently, the benchmark result shows that CPP implementation is slower than Java implementation. This is mainly caused by malloc things. Some solution is linking tcmalloc <https://gperftools.github.io/gperftools/tcmalloc.html> library which can be built from gperftools <https://github.com/gperftools/gperftools> repo. <https://gperftools.github.io/gperftools.> This will make the CPP implementation about 2.0x faster.
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