Added option "Group_Leds" to group LEDs for increased performance.

[macadamiaz]

No description provided.

[dmadison]

Hi! Thanks for the PR. I like the concept but I'm not fond of the implementation. If you're willing to rewrite it to use a macro to set the group and then copy the data when the LEDs are latched rather than when the byte stream is read I'd be happy to merge it.

[macadamiaz]

...If you're willing to rewrite it to use a macro to set the group and then copy the data when the LEDs are latched rather than when the byte stream is read I'd be happy to merge it.

I basically just hacked it in, as i'm not proficient at all in FastLED / Arduino / C. So what you're asking is way beyond my knowledge. If you or anyone wants to improve the implementation i'd appreciate it!

However, as it is i'm using it daily with a 232 LED Strip and getting a very high framerate / smoothness with it (which wasn't possible without grouping), so it does actually work.