Re: [boost] [function] timing trivia

On Thu, 12 Feb 2004, Matthew Hurd wrote:

Just completed some timings of the cost of a boost function call using a boost::function<void (void)> and a raw function pointer versus inlining the function's code directly into the source.

For my circumstances (your mileage may vary): Calling via raw function pointer = 314 microseconds +/- 1 Calling via boost function variable = 328 microseconds +/- 1

Only 14 microseconds of difference. Nice work, I was expecting much more. Note: Optimised VC7.1 output, winXP 1a, Athlon 2800+ (2.09GHz)

Looks like VC 7.1 is doing a good job optimizing this. I get asked about the performance of function<> every once in a while; mind if I stick this data in the FAQ? Doug