8 Feb
2008
8 Feb
'08
10:22 p.m.
Howard Hinnant:
Here are results (dating around 3 years ago):
In order: 63 seconds. try/back off/without yield: 47 seconds. try/back off/with yield: 34 seconds.
With Alexander Terekhov's "swap-based mutex", I'm not seeing a significant difference between the versions with and without yield. The penalty likely comes from spin-waits in lock() (which is why they're evil).
There's no significant difference with critical sections, too. Maybe I'm doing something wrong. :-)