Improve chart performance (#7360)

* wip

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* Update chart.ts

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* Improve server performance

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src/db/postgre.ts

@@ -1,3 +1,7 @@
+// https://github.com/typeorm/typeorm/issues/2400
+const types = require('pg').types;
+types.setTypeParser(20, Number);
+
 import { createConnection, Logger, getConnection } from 'typeorm';
 import config from '../config';
 import { entities as charts } from '../services/chart/entities';