thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-12-14 10:22:10 +00:00
Code Issues Packages Projects Releases Wiki Activity

improve performance

Browse Source
This commit is contained in:
taiyang-li 2023-02-15 22:00:04 +08:00
parent ddba07b9c3
commit c417f03bdd
1 changed files with 9 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
src/AggregateFunctions/QuantileGK.h
View File

@ -46,16 +46,16 @@ public:
double relative_error_,
size_t compress_threshold_ = default_compress_threshold,
size_t count_ = 0,
bool compressed_ = false,
const std::vector<Stats> & sampled_ = {})
bool compressed_ = false)
: relative_error(relative_error_)
, compress_threshold(compress_threshold_)
, count(count_)
, compressed(compressed_)
, sampled(sampled_)
{
sampled.reserve(compress_threshold);
backup_sampled.reserve(compress_threshold);
head_sampled.reserve(default_head_size);
}
bool isCompressed() const { return compressed; }
@ -133,9 +133,11 @@ public:
{
compress_threshold = other.compress_threshold;
relative_error = other.relative_error;
sampled = std::move(other.sampled);
count = other.count;
compressed = other.compressed;
sampled.resize(other.sampled.size());
memcpy(sampled.data(), other.sampled.data(), sizeof(Stats) * other.sampled.size());
return;
}
else
@ -383,10 +385,10 @@ private:
size_t count = 0;
bool compressed;
std::vector<Stats> sampled;
std::vector<Stats> backup_sampled;
PaddedPODArray<Stats> sampled;
PaddedPODArray<Stats> backup_sampled;
std::vector<T> head_sampled;
PaddedPODArray<T> head_sampled;
static constexpr size_t default_compress_threshold = 10000;
static constexpr size_t default_head_size = 50000;