On 11/23/2011 04:15 PM, Matthew Chambers wrote:
On 11/23/2011 4:13 PM, Matthew Chambers wrote:
I put together a test (http://codepad.org/lKxMXOwP):
1000000 iterations of "123": atoi: 0.0695092 seconds strtol: 0.0652839 seconds Spirit: 0.546789 seconds lexical_cast(string): 0.615594 seconds lexical_cast(iterator_range): 4.25534 seconds lexical_cast(iterator_range->string): 1.07405 seconds
1000000 iterations of "123567890": atoi: 0.0856611 seconds strtol: 0.0829571 seconds Spirit: 0.905017 seconds lexical_cast(string): 0.762137 seconds lexical_cast(iterator_range): 7.46185 seconds lexical_cast(iterator_range->string): 1.23397 seconds
1000000 iterations of "1.23456": atof: 0.520452 seconds strtod: 0.519113 seconds Spirit: 1.02579 seconds lexical_cast(string): 2.93515 seconds lexical_cast(iterator_range): 6.62648 seconds lexical_cast(iterator_range->string): 3.73831 seconds
1000000 iterations of "1.23456789e42": atof: 0.711819 seconds strtod: 0.719144 seconds Spirit: 1.48992 seconds lexical_cast(string): 3.31997 seconds lexical_cast(iterator_range): 9.87004 seconds lexical_cast(iterator_range->string): 4.20932 seconds
I forgot to say the test environment: boost 1.47 MSVC 9 SP1 Core 2 Q9400
-Matt
The spirit code isn't really optimal (see the slightly improved version attached). Also, did you turn on optimization?