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Table 8. Testing simple leftmost-longest matches (platform = linux, compiler = GNU C++ version 6.3.0)
| 
                    Expression | boost 1.65 | std::regex | POSIX | 
|---|---|---|---|
| 
                     | 
                    1.11 | 
                    1.00 | 
                    3.70 | 
| 
                     | 
                    1.00 | 
                    4.52 | 
                    12.72 | 
| 
                     | 
                    1.00 | 
                    1.26 | 
                    3.06 | 
| 
                     | 
                    1.00 | 
                    1.29 | 
                    2.95 | 
| 
                     | 
                    1.00 | 
                    1.31 | 
                    3.29 | 
| 
                     | 
                    1.58 | 
                    1.48 | 
                    1.00 | 
| 
                     | 
                    1.50 | 
                    1.50 | 
                    1.00 | 
| 
                     | 
                    3.10 | 
                    1.57 | 
                    1.00 | 
| 
                     | 
                    2.18 | 
                    2.10 | 
                    1.00 | 
| 
                     | 
                    2.27 | 
                    1.93 | 
                    1.00 | 
| 
                     | 
                    2.90 | 
                    2.19 | 
                    1.00 | 
| 
                     | 
                    2.56 | 
                    1.83 | 
                    1.00 | 
| 
                     | 
                    2.46 | 
                    2.14 | 
                    1.00 | 
| 
                     | 
                    2.35 | 
                    1.11 | 
                    1.00 |