Improve chart performance (#7360)

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* Update chart.ts

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* Improve server performance

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

@@ -20,6 +20,18 @@ export default class PerUserDriveChart extends Chart<PerUserDriveLog> {
 		};
 	}
 
+	@autobind
+	protected aggregate(logs: PerUserDriveLog[]): PerUserDriveLog {
+		return {
+			totalCount: logs[0].totalCount,
+			totalSize: logs[0].totalSize,
+			incCount: logs.reduce((a, b) => a + b.incCount, 0),
+			incSize: logs.reduce((a, b) => a + b.incSize, 0),
+			decCount: logs.reduce((a, b) => a + b.decCount, 0),
+			decSize: logs.reduce((a, b) => a + b.decSize, 0),
+		};
+	}
+
 	@autobind
 	protected async fetchActual(group: string): Promise<DeepPartial<PerUserDriveLog>> {
 		const [count, size] = await Promise.all([