Prior to this commit, the ResolvableType static cache was holding a lot of duplicates for simple types. We are using too much metadata to compute the key when the class has no generic information. so setFoo(String foo) and setBar(String bar) would result in two entries in the cache because the TypeProvider is different. On a very simple application 65% of the entries in the cache were duplicate. When the type is a Class with no generic information, the ResolvableType instance is a simple wrapper around it so we might just as well not cache it at all as the cost of finding it back from the cache is higher than creating that simple wrapper. This commit adds an explicit check; if the type is a simple Class we just return a "resolved" ResolvableType instance for it. On a few test cases, this reduces the size of the cache by 85% Issue: SPR-12275master
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