[GENERAL] what change in postgres 9.5 improvements for multi-CPU machines

[657985...@qq.com]

hello everyone:
      I was bothered by the postgres spinlock for a long time . How to 
understand this sentence "postgres 9.5 performance improvements for multi-CPU 
machines"
at present my database is 9.3.5 。  Can  it solve the  spinlock problem, if 
upgrade it to 9.5 ?