kvencoder: accelerate kvencoder test executing time (#8595)
kvencoder: accelerate kvencoder test executing time (#8595)


XuHuaiyu/tidb,coocood/tidb,kyle-wang/tidb,kyle-wang/tidb,cosmtrek/tidb,c4pt0r/tidb,qiuyesuifeng/tidb,pingcap/tidb,kyle-wang/tidb,c4pt0r/tidb,Cofyc/tidb,c4pt0r/tidb,qiuyesuifeng/tidb,ngaut/tidb,Cofyc/tidb,c4pt0r/tidb,XuHuaiyu/tidb,ngaut/tidb,c4pt0r/tidb,ngaut/tidb,kyle-wang/tidb,ngaut/tidb,cosmtrek/tidb,coocood/tidb,c4pt0r/tidb,ngaut/tidb,ming-relax/tidb,pingcap/tidb,pingcap/tidb,ngaut/tidb,kyle-wang/tidb,EvilMcJerkface/tidb,pingcap/tidb,pingcap/tidb,ming-relax/tidb,EvilMcJerkface/tidb,pingcap/tidb,kyle-wang/tidb