Diamond Events and Gas Costs

[mudgen]

I've been exploring different event designs for tracking function additions/replacements/removals in diamond contracts as part of a new simplified standard for diamonds.

Surprisingly, emitting multiple small events can cost less gas than emitting a single large event — even when the smaller events include more indexed params.

Today @AnInsaneJimJam published benchmark results comparing:

• event DiamondCut(FacetCut[] diamondCut) - one big event
• event AddFacet(address indexed facet, bytes4[] selectors) - smaller, batched events
• event AddFunction(bytes4 indexed selector, address indexed facet) - fully flattened events

Interesting findings — smaller, flatter event designs may actually be more gas-efficient and easier for indexers to work with.

Gas benchmark tests and results here: #246