Let me share my experiences with the last two ROMs available for my phone.
Phone: Xiaomi Redmi Note 4 SD (Mido)
ROMs: 8.8.2 and 8.8.9 (8.8.16 suspended, you know)
I did some experiements with both ROMs.
Both are performing really good in terms of responsiveness, smoothness, RAM management, et cetere - basically both are good ROMs.
So. Unfortunately I had too much time so I started to test both versions, in a "kinda' lab environment". This means, that both has been installed with clean install, sat in the same place, same conditions in terms of radio environment (both WLAN (802.11n @2.4GHz, 40MHz channel bandwidth, channel 11, no other APs are around, signal is strong, SNR is high) and GSM (set to 3G, signal is strong)), same accounts has been added, same things were syncronized, same apps has been installed.. et cetera. Both has been tested in an 8 hours period, 7 hours idle time and 1 hour video playback in VLC (same video file (MP4, 720p), same source (SD card), same backlight settings (40%)).
Results:
8.8.2:
7 hours idle: ~3.5% drop in battery
1h video: 7% drop in battery
8.8.9:
7 hours idle: 7% drop in battery.
1h video: 9% drop in battery
I did these tests 3 times in a row.
I used both roms for 2 charge cycles and the general usage was the same but 8.8.9 draining a bit more in idle than 8.8.2. I don't know how can I produce written evidence about this (I think I still have a bugreport from 8.8.2 & 8.8.9 too, so one can check it in Battery Historian, but I did and there's no difference between the usage, only the battery drainage is different.. the figures are getting lower in 8.8.9 much quickly, almost twice).
I know this is not a 100% controlled test but still: shows differences.
Ah, and one more thing:
Under 8.8.9 doubletap to wake is working weird: after some time of idle (screen off) it does not respond to double tap.. if I unlock the phone and lock it again it is working again, for a while (~30mins), then stops again.. not responding.
Cheers.
Phone: Xiaomi Redmi Note 4 SD (Mido)
ROMs: 8.8.2 and 8.8.9 (8.8.16 suspended, you know)
I did some experiements with both ROMs.
Both are performing really good in terms of responsiveness, smoothness, RAM management, et cetere - basically both are good ROMs.
So. Unfortunately I had too much time so I started to test both versions, in a "kinda' lab environment". This means, that both has been installed with clean install, sat in the same place, same conditions in terms of radio environment (both WLAN (802.11n @2.4GHz, 40MHz channel bandwidth, channel 11, no other APs are around, signal is strong, SNR is high) and GSM (set to 3G, signal is strong)), same accounts has been added, same things were syncronized, same apps has been installed.. et cetera. Both has been tested in an 8 hours period, 7 hours idle time and 1 hour video playback in VLC (same video file (MP4, 720p), same source (SD card), same backlight settings (40%)).
Results:
8.8.2:
7 hours idle: ~3.5% drop in battery
1h video: 7% drop in battery
8.8.9:
7 hours idle: 7% drop in battery.
1h video: 9% drop in battery
I did these tests 3 times in a row.
I used both roms for 2 charge cycles and the general usage was the same but 8.8.9 draining a bit more in idle than 8.8.2. I don't know how can I produce written evidence about this (I think I still have a bugreport from 8.8.2 & 8.8.9 too, so one can check it in Battery Historian, but I did and there's no difference between the usage, only the battery drainage is different.. the figures are getting lower in 8.8.9 much quickly, almost twice).
I know this is not a 100% controlled test but still: shows differences.
Ah, and one more thing:
Under 8.8.9 doubletap to wake is working weird: after some time of idle (screen off) it does not respond to double tap.. if I unlock the phone and lock it again it is working again, for a while (~30mins), then stops again.. not responding.
Cheers.