After few hours constant 15% CPU

[adi-]

Some time after restarting the app, I notice a constant 15% CPU usage while idle. Can you help me figure out what might be taking up the CPU?

[adi-]

There must be something wrong with mac app, because I don't have this problem with official client.

[tomasz1986]

Are you comparing the same Syncthing versions between the two? The current macOS application is either stuck at Syncthing v1.30.0 or v2.0.3, while the official Syncthing client is currently at v2.0.13-rc.1. There have been many performance-related improvements in Syncthing v2 since v2.0.3 was released.