hll-err.rb: speedup using pipelining.
hll-err.rb: speedup using pipelining.

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