[PATCH v2] Improve the performance of --num-threads -d 31

[Minfei Huang]

On 02/23/16 at 01:47pm, "Zhou, Wenjian/周文剑" wrote:
> Hello, Minfei,
> 
> Does it occur every time?
> If not, I think I have known the reason.

Hi, Wenjian.

This patch is applied directly on version 1.5.9. And makedumpfile hangs
if option num-thread is appended.

Thanks
Minfei