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Table 14. Testing simple Perl matches (platform = Windows x64, compiler = Microsoft Visual C++ version 14.1)
| 
                    Expression | boost 1.65 | PCRE-10.10 | RE2 | std::regex | boost::xpressive::cregex | 
|---|---|---|---|---|---|
| 
                     | 
                    1.90 | 
                    1.18 | 
                    1.00 | 
                    27.81 | 
                    1.32 | 
| 
                     | 
                    1.45 | 
                    1.73 | 
                    2.14 | 
                    24.75 | 
                    1.00 | 
| 
                     | 
                    2.53 | 
                    2.13 | 
                    1.00 | 
                    34.16 | 
                    1.86 | 
| 
                     | 
                    2.75 | 
                    2.34 | 
                    1.00 | 
                    40.78 | 
                    2.01 | 
| 
                     | 
                    2.54 | 
                    2.16 | 
                    1.00 | 
                    44.27 | 
                    2.04 | 
| 
                     | 
                    1.53 | 
                    1.14 | 
                    1.11 | 
                    21.63 | 
                    1.00 | 
| 
                     | 
                    1.50 | 
                    1.15 | 
                    1.13 | 
                    21.92 | 
                    1.00 | 
| 
                     | 
                    1.40 | 
                    1.15 | 
                    1.03 | 
                    35.65 | 
                    1.00 | 
| 
                     | 
                    1.47 | 
                    1.00 | 
                    1.27 | 
                    16.75 | 
                    1.03 | 
| 
                     | 
                    1.39 | 
                    1.00 | 
                    1.13 | 
                    16.90 | 
                    1.07 | 
| 
                     | 
                    1.44 | 
                    1.00 | 
                    1.10 | 
                    15.61 | 
                    1.06 | 
| 
                     | 
                    1.36 | 
                    1.00 | 
                    1.04 | 
                    15.86 | 
                    1.05 | 
| 
                     | 
                    1.40 | 
                    1.00 | 
                    1.10 | 
                    15.86 | 
                    1.07 | 
| 
                     | 
                    2.01 | 
                    1.00 | 
                    1.17 | 
                    8.24 | 
                    1.19 |