What causes lag when transitioning from watchface to activity or widgets?

I've built myself a watch face. It works great, but when switching off the watch face to a widget, or pressing the Start button to start an activity, there's a 1-2 second lag that doesn't seem to be present with other Connect IQ watch faces I've used.

Are there common performance pitfalls that cause this? Is it dependent on the amount of memory the watch face uses? Is it simply unavoidable?

The source code is here if anyone is willing to take the time to look at it: https://github.com/jonathanburchmore/HiVisDigital

Thanks in advance.

jim_m_58 over 7 years ago

What device and what FW level? There was an issue a while back on the newer Fenix devices that caused a delay like this with a number of complex watch faces, but that should be resolved in the latest firmware.

jburchm1 over 7 years ago

Fenix 5X Plus with firmware 5.10.

jim_m_58 over 7 years ago

Have you compared how your WF does this vs other similar WFs from the store to see if it's unique to yours?

jburchm1 over 7 years ago

Subjectively it feels a little slower than other WFs. I’ve done some other minor optimizations (moving my clearClip call into onPartialUpdate and caching findDrawableById calls) and it seems a little better.