Hi Alexander,
looks good, just a few minor suggestions inline.
Some measures on my computer:
add_key_fields 0.20% - out of radar
Item_func_between::add_key_fields - 0.05%
Item_equal::add_key_fields - 0.03%
Item_equal::select_optimize 0.01%
Hi Sergey,
Please review the next iteration for MDEV-7950.
This one splits the function add_key_fields() into a method in Item.
This change removes about 3 virtual calls item-type(), as well as some
virtual calls item_func-functype(), and adds one virtual call
item-add_key_fields() instead.
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