plan: benchmark optimize function (#5448)
plan: benchmark optimize function (#5448)


yangwenmai/tidb,c4pt0r/tidb,coocood/tidb,coocood/tidb,c4pt0r/tidb,pingcap/tidb,kyle-wang/tidb,kyle-wang/tidb,spongedu/tidb,ming-relax/tidb,ngaut/tidb,Cofyc/tidb,XuHuaiyu/tidb,c4pt0r/tidb,ngaut/tidb,qiuyesuifeng/tidb,pingcap/tidb,kyle-wang/tidb,spongedu/tidb,kyle-wang/tidb,pingcap/tidb,c4pt0r/tidb,mccxj/tidb,ming-relax/tidb,CodeRushing/tidb,c4pt0r/tidb,wusphinx/tidb,c4pt0r/tidb,tiancaiamao/tidb,Nify/tidb,cosmtrek/tidb,ngaut/tidb,kyle-wang/tidb,EvilMcJerkface/tidb,pingcap/tidb,mccxj/tidb,qiuyesuifeng/tidb,pingcap/tidb,ngaut/tidb,tiancaiamao/tidb,yangwenmai/tidb,kyle-wang/tidb,ngaut/tidb,cosmtrek/tidb,XuHuaiyu/tidb,Cofyc/tidb,wusphinx/tidb,pingcap/tidb,EvilMcJerkface/tidb,ngaut/tidb,CodeRushing/tidb,Nify/tidb