add perf-node script
add perf-node script

LinusU/buffer,SAGV/buffer,loon3/buffer,loon3/buffer,SAGV/buffer,nolanlawson/buffer,feross/buffer,btd/buffer,nolanlawson/buffer,kawanet/buffer,feross/buffer,feross/buffer,kawanet/buffer,btd/buffer,jessetane/buffer,LiuDeng/buffer,LiuDeng/buffer,beni55/buffer,LinusU/buffer,beni55/buffer