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MDEV-7943 - pthread_getspecific() takes 0.76% in OLTP RO

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Added THD argument to select_result and all derivative classes.
This reduces number of pthread_getspecific calls from 796 to 776 per OLTP RO
transaction.
This commit is contained in:
Sergey Vojtovich
2015-04-22 13:29:56 +04:00
parent 8345bc6921
commit b22959903b
18 changed files with 149 additions and 127 deletions
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11
sql/sql_class.cc
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@@ -2628,11 +2628,6 @@ void THD::rollback_item_tree_changes()
** Functions to provide a interface to select results
*****************************************************************************/
select_result::select_result()
{
thd=current_thd;
}
void select_result::cleanup()
{
/* do nothing */
@@ -3290,12 +3285,6 @@ err:
}
select_subselect::select_subselect(Item_subselect *item_arg)
{
item= item_arg;
}
int select_singlerow_subselect::send_data(List<Item> &items)
{
DBUG_ENTER("select_singlerow_subselect::send_data");