| ⇢ | B | EventEmitterStatic::storeCallback() added | |
| ⇢ | B | EventEmitterStatic::isValidCallback() added | |
| A | ↘ | B | EventEmitter::_emit() got worse |
| B | ↗ | A | EventEmitterStatic::_prependOnceListenerStatic() improved |
| B | ↗ | A | EventEmitterStatic::_prependListenerStatic() improved |