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Table 12. Testing simple Perl matches (platform = linux, compiler = GNU C++ version 6.3.0)
| 
                    Expression | boost 1.65 | std::regex | boost::xpressive::cregex | PCRE-10.21 | 
|---|---|---|---|---|
| 
                     | 
                    2.65 | 
                    2.86 | 
                    1.00 | 
                    1.37 | 
| 
                     | 
                    2.52 | 
                    20.99 | 
                    1.00 | 
                    3.50 | 
| 
                     | 
                    1.98 | - | 
                    1.00 | 
                    1.32 | 
| 
                     | 
                    2.06 | - | 
                    1.00 | 
                    1.34 | 
| 
                     | 
                    1.93 | - | 
                    1.00 | 
                    1.24 | 
| 
                     | 
                    2.34 | 
                    4.45 | 
                    1.00 | 
                    1.62 | 
| 
                     | 
                    2.33 | 
                    4.39 | 
                    1.00 | 
                    1.60 | 
| 
                     | 
                    2.08 | 
                    3.31 | 
                    1.00 | 
                    1.52 | 
| 
                     | 
                    2.28 | 
                    3.39 | 
                    1.00 | 
                    1.18 | 
| 
                     | 
                    2.12 | 
                    3.02 | 
                    1.00 | 
                    1.19 | 
| 
                     | 
                    2.12 | 
                    2.66 | 
                    1.00 | 
                    1.17 | 
| 
                     | 
                    2.00 | 
                    2.65 | 
                    1.00 | 
                    1.22 | 
| 
                     | 
                    2.05 | 
                    2.81 | 
                    1.00 | 
                    1.22 | 
| 
                     | 
                    1.65 | 
                    1.83 | 
                    1.00 | 
                    1.02 |