msg/async: use bitset<> to do the popcnt #18681
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libstdc++ uses popcnt to count the bits. it's faster and simpler. Signed-off-by: Kefu Chai <kchai@redhat.com>
yuyuyu101
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Nov 2, 2017
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libstdc++ uses popcnt to count the bits. it's faster and simpler.
Signed-off-by: Kefu Chai kchai@redhat.com