Now this is important. Operators that form expressions and statements, while truly expressive, should be used judiciously and sparingly. While aggressive compiler optimizations and inline code helps a lot to produce tighter and faster code, lazy operators and statements will always have more overhead compared to lazy- functions and bound simple functors especially when the logic gets to be quite complex. It is not only run-time code that hits a penalty, complex expressions involving lazy-operators and lazy- functions are also much more difficult to parse and compile by the host C++ compiler and results in much longer compile times.
Lambda vs. Offline Functions
The best way to use the framework is to write generic off-line lazy functions (see functions) then call these functions lazily using straight-forward inline lazy-operators and lazy-statements.
While it is indeed satisfying to impress others with quite esoteric uses of operator overloading and generative programming as can be done by lazy-operators and lazy-statements, these tools are meant to be used for the right job. That said, caveat-emptor.
|need benchmarks, benchmarks, and more benchmarks|
Copyright © 2001-2002 Joel de Guzman
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