Whoops! Those were debug build numbers. Here's release build numbers. These and the debug tests are is vc7.1, using whatever optimization settings the default project contains. Again, I think these tests are just a quick check, not a thorough investigation. I'll try to post the actual test code tomorrow. results: elapsed ms thread time ms ns / call cout 10981 343 34300 enabled log 1281 203 20300 cout "disabled" 0 0 0 cout "dis" func 16 15 15 disabled log 16 15 15 In release build, I believe my contrived cout "disabled" test was optimized away. When replaced with a function call it seems to be same speed as disabled log: //in another file: bool UseCout(){return false;} //outside loop: extern bool UseCout(); //in loop: if(UseCout()) { cout << l_dw << endl; } Andrew Schweitzer wrote: [snip]
recorded time to execute some simple pieces of logging code in a loop. Divided by loop iterations to get time per iteration. This is a 3Ghz Pentium. Not sure how good these tests are, but here's the results:
results: elapsed ms thread time ms ns / call cout 1329 421 42100 enabled log 1469 453 45300 cout "disabled"15 15 15 disabled log 531 531 531 _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost