redis / node-redis

Can someone please explain why is this happening:

Lines 896 to 899 in 4f85030

    
           } else { // buffer 
        
               this.write('$' + arg.length + '\r\n'); 
        
               this.write(arg); 
        
               this.write('\r\n');

Let`s concatenate the data and send once.

	} else { // buffer
	this.write('$' + arg.length + '\r\n');
	this.write(arg);
	this.write('\r\n');

3 socket writes instead of one?