For materialization, use "Ignore return values" option to improve performance

For a performance improvement, change to use Flag.IGNORE_RETURN_VALUES

Cache noPreviousValueCache = cache.getAdvancedCache().withFlags(Flag.IGNORE_RETURN_VALUES);
noPreviousValueCache.put(k, v);

or can use ConfigurationBuilder settings:

ConfigurationBuilder cb = new ConfigurationBuilder();
cb.unsafe().unreliableReturnValues(true);