It was identified in T243951: Lua creates lots of ItemId and PropertyId objects that these objects might be causing a bit of a performance hit, but we thought it may not be worth it and declined the ticket.
This topic came up again in {T249587#6086933} with a concrete starting point.

Some good points to look at will be:

• Subclassing
• Redundant splitting and recombining
• Redundant storage of the same strings
• Early manipulation in the constructor (that could be deffered?)

Acceptance Criteria:

• Creation of objects is profiled in current state (memory and construction / interaction times)
• Improvements to performance are made keeping the external interfaces and interactions the same
• Profile the end result
• Document in this ticket any visible impact on production after deployment.