On 4/10/2013 11:55 PM, Paulo Pinto wrote:
Some of our consulting projects are conversion of C++ code into one of the said
technologies. We usually achieve performance parity with the existing
application.
With C, C++ and Fortran it is easier to achieve a certain performance level
without effort, while the other languages require a bit of effort knowing the
runtime, writing GC friendly data structures and algorithms, and doing
performance analysis, but it achievable as well.
Many developers don't want to do this, hence my statement.
I've seen enough "performant" C++ code to disagree with your statement. If they
knew what was going on with how C++ implemented their constructions, they could
get a lot better performance.
The second problem with writing performant C and C++ code is the difficulty of
refactoring code to try different data structures & algorithms. Generally, one
picks a design up front, and never changes it because it is too hard to change it.
