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Table 8. Testing Perl searches (platform = Windows x64, compiler = Microsoft Visual C++ version 14.0)
| 
                    Expression | boost 1.60 | PCRE-10.10 | RE2 | std::regex | boost::xpressive::cregex | 
|---|---|---|---|---|---|
| 
                     | 
                    1.26 | 
                    1.00 | 
                    1.45 | - | 
                    3.00 | 
| 
                     | 
                    2.94 | 
                    1.28 | 
                    1.00 | - | 
                    2.92 | 
| 
                     | 
                    2.42 | 
                    1.26 | 
                    1.00 | - | 
                    5.12 | 
| 
                     | 
                    2.87 | 
                    1.28 | 
                    1.00 | - | 
                    3.25 | 
| 
                     | 
                    2.78 | 
                    1.27 | 
                    1.00 | - | 
                    4.03 | 
| 
                     | 
                    1.00 | 
                    2.87 | - | - | - | 
| 
                     | 
                    1.92 | 
                    1.00 | - | - | 
                    1.55 | 
| 
                     | 
                    29.23 | 
                    38.71 | 
                    1.00 | 
                    995.92 | 
                    27.63 | 
| 
                     | 
                    1.60 | 
                    1.10 | 
                    2.55 | 
                    8.53 | 
                    1.00 | 
| 
                     | 
                    1.00 | 
                    1.66 | - | - | - | 
| 
                     | 
                    1.60 | 
                    1.00 | - | - | - | 
| 
                     | 
                    1.54 | 
                    1.18 | 
                    1.81 | 
                    8.53 | 
                    1.00 | 
| 
                     | 
                    1.52 | 
                    1.17 | 
                    1.80 | 
                    8.51 | 
                    1.00 |