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[optimize](string) optimize concat function by SIMD memcpy (#18458)

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Optimize concat function 29% up by memcpy_small_allow_read_write_overflow15.
Optimize string functions list: concat, convert_to, mask, initcap, lower, upper.

concat function has 29% up:
This commit is contained in:
ZhangYu0123
2023-04-08 17:05:34 +08:00
committed by GitHub
parent 58bbd46c65
commit fb50626075
2 changed files with 19 additions and 12 deletions
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10
be/src/vec/functions/function_string.cpp
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@ -255,8 +255,9 @@ struct TransferImpl {
}
res_offsets.resize(offset_size);
memcpy(res_offsets.data(), offsets.data(),
offset_size * sizeof(ColumnString::Offsets::value_type));
memcpy_small_allow_read_write_overflow15(
res_offsets.data(), offsets.data(),
offset_size * sizeof(ColumnString::Offsets::value_type));
size_t data_length = data.size();
res_data.resize(data_length);
@ -279,8 +280,9 @@ struct InitcapImpl {
ColumnString::Chars& res_data, ColumnString::Offsets& res_offsets) {
size_t offset_size = offsets.size();
res_offsets.resize(offsets.size());
memcpy(res_offsets.data(), offsets.data(),
offset_size * sizeof(ColumnString::Offsets::value_type));
memcpy_small_allow_read_write_overflow15(
res_offsets.data(), offsets.data(),
offset_size * sizeof(ColumnString::Offsets::value_type));
size_t data_length = data.size();
res_data.resize(data_length);