Hi all,
Could my patch on #3678 please be considered? It's just a small optimization - currently the @attributes hash is duped (the slow way - going through attribute_names and injecting into a new hash) on every record save when there's no normal attributes changed, only to check if any of the attributes loaded are also in serialized_attributes.
My patch simply changes the method to perform its check using @attributes rather than calling attributes. This fix speeds up saves and perhaps more importantly reduces garbage. It has also the beneficial side effect of not triggering a load of lazy-loaded attributes if you use a plugin like my columns_on_demand, though that's not so important for core.
Thanks, Will