Created
October 15, 2016 18:00
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| $ g++ --version | |
| g++ (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4 | |
| Copyright (C) 2013 Free Software Foundation, Inc. | |
| This is free software; see the source for copying conditions. There is NO | |
| warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
| $ g++ count_bits.cpp -o count_bits -std=c++11 -O0 | |
| $ ./count_bits | |
| count_by_table : sum=7999207000, duration=1989441628ns | |
| count_by_bit_operation: sum=7999207000, duration=1062128807ns | |
| $ g++ count_bits.cpp -o count_bits -std=c++11 -O3 | |
| $ ./count_bits | |
| count_by_table : sum=8002548000, duration=610439134ns | |
| count_by_bit_operation: sum=8002548000, duration=239137188ns |
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