Code in instanceKlass.cpp that fetches the init_lock out of the mirror can be improved to get the init_lock more cheaply from the handle.

For example, change:
    Handle h_init_lock(THREAD, init_lock());
    ObjectLocker ol(h_init_lock, THREAD, init_lock() != NULL);
to:
    Handle h_init_lock(THREAD, init_lock());
    ObjectLocker ol(h_init_lock, THREAD, h_init_lock() != NULL);