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Table 15. Testing leftmost-longest searches (platform = linux, compiler = GNU C++ version 6.3.0)
| 
                    Expression | boost 1.65 | std::regex | POSIX | 
|---|---|---|---|
| 
                     | 
                    1.00 | 
                    1.44 | 
                    1.64 | 
| 
                     | 
                    1.00 | 
                    6.89 | 
                    1.59 | 
| 
                     | 
                    1.03 | 
                    36.27 | 
                    1.00 |