I found the opposite in a test - YouTube serving up VP9/OPUS at 1080p in both Orion and Safari. Safari used far more CPU (approx 27% on their Graphics/media process) than Orion did (5% on its Graphics/media process), which is quite different to these findings. That was on an M1 Pro MBP... Safari was cleanly launched, as was Orion.
I suggest that a priority here is to identify a single reproduction case - an agreed video URL, resolution, etc. and to test both Orion and Safari with no extensions in use.
Vlad VTDecoderXPCService is barely used by Safari if at all, the way you can reproduce it is by watching any video on YouTube, looks like Orion is using decoders that are different than Safari's hence the need to decode using VTDecoderXPCService.
So not dismissing your finding, but this is why "steps to reproduce" are important. It could be a specific system/system settings/browser setting/website setting/way you measure that you are using that is causing this.
I can't reproduce Safari and Orion using different codecs. You can check easily what is being used by right clicking the video area and choosing "stats for nerds", so there's no need to guess
Take note of the Current/Optimal resolution, and the Codecs line (the numbers in brackets are the important ones to compare). The codec string tells you the codec being used (i.e. VP09 = VP9 codec, AV01 = AV1 codec).
You should expect to see identical ones on both Safari and Orion.
I believe you mentioned concerns about loginwindow using 10% CPU - something does sound untoward on your system. Do you have any kind of system/utility apps installed or running that might be meddling with things? I assume you've rebooted the computer?
b3noit These things are nuanced. Try to submit reproducible evidence. Have you checked something else is causing it? Extensions? Settings?
I have now opened the video in Orion and Brave. Note that Orion is up for a few days with dozen of tabs open. Brave was just started playing video in one tab.
Orion is still consuming less energy than Brave playing that same video.
Vlad Understood, will be more sensitive with media issues. Aside: how're you grouping processes like that in Activity Monitor? I see an "All Processes, Hierarchically" in the View menu but it doesn't create that exact output list
Open Safari and Orion in split screen (with each occupying exactly 50% of screen space). Only 1 tab each.
Disable all extensions
Replicate application settings e.g. content blocking, css rules etc.
Load this video URL:
Play both at the same time. (Naturally when clicking from one app to the other there is lag, so pause the lead video and resume playback when the other video catches up. Now they're in complete sync.)
Take screenshot of activity monitor at several times of the video.
Compare resource usage activity monitor (using processes identifiably belonging to each app. See images. Blue = Safari. Green = Orion.)
Repeat test case steps 4-6 above several times to ensure consistency of results.
I noticed a high usage of CPU too. I have a Macbook air 2020 (M1) temperature goes over 90Âş with just 2 youtube tabs opened. Love this browser but I'll have to stay with Safari for now.
EdgardMello Thank you for noticing that. Do you have steps to reproduce this in a way that in Safari under same circumstances, load is substaintially lower?
