FULL PRODUCT VERSION :
dk1.8.0_144

ADDITIONAL OS VERSION INFORMATION :
Windows 10

A DESCRIPTION OF THE PROBLEM :
javax.accessibility.AccessibleBundle will reload the ResourceBundle for every call to toDisplayString.



AccessibleBundle.loadResourceBundle method doesn't check properly for the key Locale, it seems you have similar bug as http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/8u40-b25/javax/accessibility/AccessibleBundle.java#AccessibleBundle.toDisplayString%28%29

The line: if (! table.contains(locale)) {
Should say: if (! table.containsKey(locale)) {


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Use AccessibleRole.toDisplayString() and watch memory allocations with profiler.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The resource bundle should be used from the table cache every time.
ACTUAL -
The resource bundle is reloaded and overwritten with every call.

REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :
workaround is to write the value of Locale to the table so it can go past the bad "if"

Hashtable table = (Hashtable)getDeclaredField(AccessibleBundle.class, "table");

     if (table != null) {
     Locale locale = Locale.US;
     if (!table.contains(locale) && table.containsKey(locale)) {
table.put(locale, locale);
}
     }