Angular 4 application slows down over time [closed]

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Closed 3 years ago .

Hello. I have an Angular 4.3.5 application that gets slower when it is used after a while (~20 minutes).

My scenario is more or minus this:

• REST API and Angular static files stay on a RaspberryPI B 3
• approximately 30 RaspberryPI B 3 access the Angular application through Chromium (versions 58 and 60)

What happens:

• angular HTTP requests get slower as time goes on. Example: from ~100 ms to 2 seconds

Additional information:

• If I press F5 no Chromium Angular application returns to normal
• Angular uses this template https://themeforest.net/item/primer-angular-2-material-design-admin-template/19228165
• Angular uses an app for Google Chrome / Chromium, which I wrote, to communicate with an arduino via the serial port (Chrome APIs I use: chrome.runtime.sendMessage, chrome.runtime.connect and chrome.serial)
• the clients, RaspberryPI, have available resources (CPU and memory) when the application is slow
• the Angular application stores almost nothing in the browser