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Potential improvement #3490

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This commit is contained in:
Alexey Milovidov 2018-11-05 13:34:48 +03:00
parent 6f00f165e5
commit a191c32254
1 changed files with 10 additions and 8 deletions
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18
dbms/src/Common/HashTable/HashTable.h
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@ -572,7 +572,8 @@ public:
return iteratorToZero();
const Cell * ptr = buf;
while (ptr < buf + grower.bufSize() && ptr->isZero(*this))
auto buf_end = buf + grower.bufSize();
while (ptr < buf_end && ptr->isZero(*this))
++ptr;
return const_iterator(this, ptr);
@ -587,7 +588,8 @@ public:
return iteratorToZero();
Cell * ptr = buf;
while (ptr < buf + grower.bufSize() && ptr->isZero(*this))
auto buf_end = buf + grower.bufSize();
while (ptr < buf_end && ptr->isZero(*this))
++ptr;
return iterator(this, ptr);
@ -814,9 +816,9 @@ public:
if (this->hasZero())
this->zeroValue()->write(wb);
for (size_t i = 0; i < grower.bufSize(); ++i)
if (!buf[i].isZero(*this))
buf[i].write(wb);
for (auto ptr = buf, buf_end = buf + grower.bufSize(); ptr < buf_end; ++ptr)
if (!ptr->isZero(*this))
ptr->write(wb);
}
void writeText(DB::WriteBuffer & wb) const
@ -830,12 +832,12 @@ public:
this->zeroValue()->writeText(wb);
}
for (size_t i = 0; i < grower.bufSize(); ++i)
for (auto ptr = buf, buf_end = buf + grower.bufSize(); ptr < buf_end; ++ptr)
{
if (!buf[i].isZero(*this))
if (!ptr->isZero(*this))
{
DB::writeChar(',', wb);
buf[i].writeText(wb);
ptr->writeText(wb);
}
}
}