spring-projects/spring-framework — pull request #682 by overmindx (2014-10-28 10:58:27+00:00)
Title: In, AutowireUtils, Using valueOf is faster than using constructor

Using valueOf is approximately 3.5 times faster than using constructor

Because Using new Integer(int) is guaranteed to always result in a new object whereas Integer.valueOf(int) allows caching of values to be done by the compiler, class library, or JVM.

So, I changed source like(70line) this
return (new Integer(c1pl)).compareTo(c2pl) * -1;
==> return (Integer.valueOf(c1pl)).compareTo(c2pl) * -1;