manual memory management

[Era Scarecrow]

On Tuesday, 8 January 2013 at 22:19:56 UTC, Walter Bright wrote:
> Interestingly, carefully written code using a GC can be 
> *faster* than manual memory management, for a number of rather 
> subtle reasons.

  One being calling the OS to allocate memory is an expensive 
operation (freeing as well?). I would think a smart GC once it 
identifies a free memory block may not free it to the OS but hold 
onto it, then give it to another process when asked for memory, 
thereby skipping the OS step.