I'm confused, do you mean just within your kernel or in general?
(Anecdote) Screen off idle time was one of the first things that for me hooked on your kernel. At home, on WiFi, I was dropping 20%+ while sleeping on stock whereas with your kernel it's 5% or so. (/Anecdote)
Sent from my Nexus 5 using XDA Free mobile app
That was because when the Nexus 5 was launched they had a bug on the Wi-Fi drivers that frakked the battery life. Before they launched 4.4.2 I merged a couple patches from kernel_common (base Kernel tree from Android) that fixed it