Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Below are the results of a performance comparison between:
Test Specifications
hyper-threaded 3GHz Xeon with 1Gb RAM
Windows XP Pro
Visual C++ .NET 2003 (7.1)
Dinkumware, version 313
1.33+, BOOST_REGEX_USE_CPP_LOCALE, BOOST_REGEX_RECURSIVE
0.9.6a
The following tests evaluate the time taken to match the expression to the input string. For each result, the top number has been normalized relative to the fastest time, so 1.0 is as good as it gets. The bottom number (in parentheses) is the actual time in seconds. The best time has been marked in green.
| static xpressive | dynamic xpressive | Boost | Text | Expression |
|---|---|---|---|---|
| 1(3.2e‑007s) | 1.37(4.4e‑007s) | 2.38(7.6e‑007s) | 100- this is a line of ftp response which contains a message string | ^([0-9]+)(\-| |$)(.*)$ |
| 1(6.4e‑007s) | 1.12(7.15e‑007s) | 1.72(1.1e‑006s) | 1234-5678-1234-456 | ([[:digit:]]{4}[- ]){3}[[:digit:]]{3,4} |
| 1(9.82e‑007s) | 1.3(1.28e‑006s) | 1.61(1.58e‑006s) | john_maddock@compuserve.com | ^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$ |
| 1(8.94e‑007s) | 1.3(1.16e‑006s) | 1.7(1.52e‑006s) | foo12@foo.edu | ^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$ |
| 1(9.09e‑007s) | 1.28(1.16e‑006s) | 1.67(1.52e‑006s) | bob.smith@foo.tv | ^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$ |
| 1(3.06e‑007s) | 1.07(3.28e‑007s) | 1.95(5.96e‑007s) | EH10 2QQ | ^[a-zA-Z]{1,2}[0-9][0-9A-Za-z]{0,1} {0,1}[0-9][A-Za-z]{2}$ |
| 1(3.13e‑007s) | 1.09(3.42e‑007s) | 1.86(5.81e‑007s) | G1 1AA | ^[a-zA-Z]{1,2}[0-9][0-9A-Za-z]{0,1} {0,1}[0-9][A-Za-z]{2}$ |
| 1(3.2e‑007s) | 1.09(3.5e‑007s) | 1.86(5.96e‑007s) | SW1 1ZZ | ^[a-zA-Z]{1,2}[0-9][0-9A-Za-z]{0,1} {0,1}[0-9][A-Za-z]{2}$ |
| 1(2.68e‑007s) | 1.22(3.28e‑007s) | 2(5.36e‑007s) | 4/1/2001 | ^[[:digit:]]{1,2}/[[:digit:]]{1,2}/[[:digit:]]{4}$ |
| 1(2.76e‑007s) | 1.16(3.2e‑007s) | 1.94(5.36e‑007s) | 12/12/2001 | ^[[:digit:]]{1,2}/[[:digit:]]{1,2}/[[:digit:]]{4}$ |
| 1(2.98e‑007s) | 1.03(3.06e‑007s) | 1.85(5.51e‑007s) | 123 | ^[-+]?[[:digit:]]*\.?[[:digit:]]*$ |
| 1(3.2e‑007s) | 1.12(3.58e‑007s) | 1.81(5.81e‑007s) | +3.14159 | ^[-+]?[[:digit:]]*\.?[[:digit:]]*$ |
| 1(3.28e‑007s) | 1.11(3.65e‑007s) | 1.77(5.81e‑007s) | -3.14159 | ^[-+]?[[:digit:]]*\.?[[:digit:]]*$ |
The next test measures the time to find all matches in a long English text. The text is the complete works of Mark Twain, from Project Gutenberg. The text is 19Mb long. As above, the top number is the normalized time and the bottom number is the actual time. The best time is in green.
| static xpressive | dynamic xpressive | Boost | Expression |
|---|---|---|---|
| 1(0.019s) | 1(0.019s) | 2.98(0.0566s) | Twain |
| 1(0.0176s) | 1(0.0176s) | 3.17(0.0556s) | Huck[[:alpha:]]+ |
| 3.62(1.78s) | 3.97(1.95s) | 1(0.492s) | [[:alpha:]]+ing |
| 2.32(0.344s) | 3.06(0.453s) | 1(0.148s) | ^[^
]*?Twain |
| 1(0.0576s) | 1.05(0.0606s) | 1.15(0.0664s) | Tom|Sawyer|Huckleberry|Finn |
| 1.24(0.164s) | 1.44(0.191s) | 1(0.133s) | (Tom|Sawyer|Huckleberry|Finn).{0,30}river|river.{0,30}(Tom|Sawyer|Huckleberry|Finn) |