> When compiling the same programs with these compilers, g++ 2.95 is > much (sometimes 3 times) faster than g++ 3.0, even without > optimizing (without -O).
Not sure what you asking. Are you saying g++ 2.95 is faster, or that the generated code is faster? > Why is it happening? Is it so because of more complex templates in recent > libstdc++? If you are asking for compilation speed, yes, the main cause it that libstdc++ consists of many more templates now. If you are asking for a slow-down in an application, you need to provide detailed test cases. > Is g++ 3.0 really a step further ? It certainly is. g++ is much more standards compliant that 2.95; mainly because of the new C++ library. The new C++ ABI is also more memory-efficient in some cases. Regards, Martin
