On 9/20/14, 12:42 AM, Dicebot wrote:
On Friday, 19 September 2014 at 15:09:41 UTC, Andrei Alexandrescu wrote:
as amount of write operations gets out of control. Every single attempt
to do something clever with shared CoW strings in C++ I have met was a
total failure.
What were the issues?
Usually it went that way:
1) Get basic implementation, become shocked how slow it is because of
redundant reference increments/decrements and thread safety
2) Add speed-up hacks to avoid reference count amending when considered
unnecessary
3) Get hit by a snowball of synchronization / double-free issues and
abandon the idea completely after months of debugging.
I understand. RC strings will work just fine. Compared to interlocked
approaches we're looking at a 5x improvement in RC speed for the most
part because we can dispense with most interlocking. -- Andrei
