clearClip is almost 4 more times expensive then setClip

1. bug is bug

2. yes I can and even I do it and even I have to do it but use setClip(device_size) instead of clearlip() - first usage setClip practically force tu use somewhen clearClip

3. if you see my WF you surly will know that it isn't only one drawing but drawing in loop - it's not enough to clearClip only once - practically I have to clearclip after each of controls because I don't know if next control call setClip or not (there are some IF's).

1. bug is bug

2. yes I can and even I do it and even I have to do it but use setClip(device_size) instead of clearlip() - first usage setClip practically force tu use somewhen clearClip

3. if you see my WF you surly will know that it isn't only one drawing but drawing in loop - it's not enough to clearClip only once - practically I have to clearclip after each of controls because I don't know if next control call setClip or not (there are some IF's).

Looks to me you have big bugs in onUpdate and you set clips to hide them.  In onUpdate, you ALWAYS want to update the entire screen.

Looks to me you have a bug with displaying hours and whatever the "16" is The fact you also lost seconds means you're not doing that properly in onUpdate, where you don't even have to set a clip region.

no, I need clip in onUpdate:

with clip

without

You can do this with only one clip region (for seconds in onPartialUpdate())  I do it all the time! Figure out how many characters will fit, limit the length of a sting and just display that many.

You are wrong

- name of town can be longer than width of filed - I have to calculate length of string, shorten it or simple clip

- drawing hours/minutes/seconds/ am/pm - overleaped others regions

- bottom icon without clip overlaps progress and upper icons

- all numbers overleaps progresses

....

try to draw this pictures without clips

I need a lot of data not only time and steps so have to use each pixels

You really only want to only use setClip in onPartialUpdate.  There is no need for it in onUpdate.