SORT: Don't sort Set elements if not needed.
SORT: Don't sort Set elements if not needed.

Related to #2094.

ramonsnir/redis,xuzhezhaozhao/redis_reading,MSOpenTech/redis,ksarch-saas/redis,maodeyi/redis_lua,darksideofthemoo/redis-histogram,MSOpenTech/redis,darksideofthemoo/redis-histogram,jxwr/redis,maodeyi/redis_lua,ttuna/msot-redis,louisliangjun/redis,ksarch-saas/redis,splitice/redis,louisliangjun/redis,ksarch-saas/redis,ksarch-saas/redis,ttuna/msot-redis,HunanTV/redis,darksideofthemoo/redis-histogram,splitice/redis,xuzhezhaozhao/redis_reading,spearhead-ea/redis,ttuna/msot-redis,xuzhezhaozhao/redis_reading,MSOpenTech/redis,ttuna/msot-redis,himoca/redis,MSOpenTech/redis,himoca/redis,HunanTV/redis,maodeyi/redis_lua,spearhead-ea/redis,splitice/redis,ramonsnir/redis,HunanTV/redis,louisliangjun/redis,darksideofthemoo/redis-histogram,slfs007/mk-redis,MSOpenTech/redis,slfs007/mk-redis,slfs007/mk-redis,himoca/redis,spearhead-ea/redis,louisliangjun/redis,HunanTV/redis,jxwr/redis,splitice/redis,ramonsnir/redis,ttuna/msot-redis,xuzhezhaozhao/redis_reading,jxwr/redis