Improve chart performance (#7360)

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* Update chart.ts

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* Improve server performance

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src/queue/initialize.ts

@@ -0,0 +1,18 @@
+import * as Queue from 'bull';
+import config from '../config';
+
+export function initialize(name: string, limitPerSec = -1) {
+	return new Queue(name, {
+		redis: {
+			port: config.redis.port,
+			host: config.redis.host,
+			password: config.redis.pass,
+			db: config.redis.db || 0,
+		},
+		prefix: config.redis.prefix ? `${config.redis.prefix}:queue` : 'queue',
+		limiter: limitPerSec > 0 ? {
+			max: limitPerSec * 5,
+			duration: 5000
+		} : undefined
+	});
+}