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replace pow(2,x) by ldexp(1.0,x) for performance

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This commit is contained in:
Alexander Voigt 2023-07-20 09:28:35 +02:00
parent 2d25a93126
commit b685f3cab7
1 changed files with 1 additions and 1 deletions
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common/hyperloglog.cc
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@ -13,7 +13,7 @@ namespace mold {
i64 HyperLogLog::get_cardinality() const {
double z = 0;
for (i64 val : buckets)
z += pow(2, -val);
z += std::ldexp(1.0, -val);
return ALPHA * NBUCKETS * NBUCKETS / z;
}