Its only being used in define lookups in the cpp. It makes cpp() about 10% slower on a file that only contains #define and #if defined() statements.
arne
On Fri, 30 May 2014, Marcus Comstedt (ACROSS) (Hail Ilpalazzo!) @ Pike (-) developers forum wrote:
Benchmarks!
But yeah, for the optimization to be meaningful there should be at least be a shortpath for the case where the element is already at the head (which does not move it).