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Table 13. Testing Perl searches (platform = Windows x64, compiler = Microsoft Visual C++ version 14.1)
| 
                    Expression | boost 1.65 | PCRE-10.10 | RE2 | std::regex | boost::xpressive::cregex | 
|---|---|---|---|---|---|
| 
                     | 
                    1.36 | 
                    1.00 | 
                    1.08 | - | 
                    2.89 | 
| 
                     | 
                    3.05 | 
                    1.58 | 
                    1.00 | - | 
                    3.31 | 
| 
                     | 
                    2.11 | 
                    1.31 | 
                    1.00 | - | 
                    4.28 | 
| 
                     | 
                    2.73 | 
                    1.41 | 
                    1.00 | - | 
                    3.14 | 
| 
                     | 
                    2.32 | 
                    1.57 | 
                    1.00 | - | 
                    3.76 | 
| 
                     | 
                    1.00 | 
                    2.90 | - | - | - | 
| 
                     | 
                    1.55 | 
                    1.00 | - | - | 
                    1.46 | 
| 
                     | 
                    26.17 | 
                    32.97 | 
                    1.00 | 
                    811.84 | 
                    23.34 | 
| 
                     | 
                    1.58 | 
                    1.00 | 
                    2.48 | 
                    5.39 | 
                    1.09 | 
| 
                     | 
                    1.00 | 
                    1.70 | - | - | - | 
| 
                     | 
                    1.62 | 
                    1.00 | - | - | - | 
| 
                     | 
                    1.48 | 
                    1.08 | 
                    1.78 | 
                    7.75 | 
                    1.00 | 
| 
                     | 
                    1.48 | 
                    1.08 | 
                    1.76 | 
                    7.72 | 
                    1.00 |