Improve chart performance (#7360)

* wip

* wip

* wip

* wip

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* Update chart.ts

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* Improve server performance

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* wip

src/services/chart/charts/classes/per-user-reactions.ts

@@ -18,6 +18,18 @@ export default class PerUserReactionsChart extends Chart<PerUserReactionsLog> {
 		return {};
 	}
 
+	@autobind
+	protected aggregate(logs: PerUserReactionsLog[]): PerUserReactionsLog {
+		return {
+			local: {
+				count: logs.reduce((a, b) => a + b.local.count, 0),
+			},
+			remote: {
+				count: logs.reduce((a, b) => a + b.remote.count, 0),
+			},
+		};
+	}
+
 	@autobind
 	protected async fetchActual(group: string): Promise<DeepPartial<PerUserReactionsLog>> {
 		return {};