Scripting: objects caching for Lua c->argv creation.
Scripting: objects caching for Lua c->argv creation.

Reusing small objects when possible is a major speedup under certain
conditions, since it is able to avoid the malloc/free pattern that
otherwise is performed for every argument in the client command vector.

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