During video calls

One reason could be the over-usage of the CPU, causing the clock speed to be limited.

On my lightweight, low-powered laptop, the CPU automatically limits its power and clock speed when most of the cores are in use.

Video calling in the web browser uses a feature called WebRTC, and this typically uses as many CPU cores as it can.

This inevitably leads to the CPU speed being limited, and the laptop becomes unusable.

Apps which cause this

(In my experience)

• Video calling in a web browser, especially

• Telegram desktop app (may have improved recently; I haven't tested it for a few months)

Solutions

There are a couple of solutions to this.

1. Limit the number of CPU cores that the offending process/es have access to.

2. Limit the CPU utilization percentage that the offending process/es have access to.

3. Raise the CPU rate-limiting threshold/s.