After doing some research in this field it looks like performance for most js library creators is not important, jquery is a good example - there are alternatives like velocity.js, but it looks like the mainstream developer still does not care about performance.
Also many charting libraries are catastrophic - even the "industry standard" ones are really bad on performance and power saving.
Maybe a reason for this is the lack for good performance oriented JS literature and resources, even in the most guru-ized books about JS there is not a lot to be found about performance and power saving, also I was not able to find these:
* a comprehensive performance and power saving oriented guide for JS frontend developers that teaches about best practices.
* a good tutorial on how to implement constant debugging for performance and power saving into your workflow (think of a "gulp perf-profile" task).
* a good collection of performance and power saving optimized frontend libraries - (an "awesome js performance and power saving" github repo would be a good start).
If you are in the know of the secret sources, please tell us, thanks!
Also any hint on this issue is welcome, thank you very much and have a nice day!