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I just spent an hour using an iPhone to take videos of iPhones taking video of an iPhone (with a fifth iPhone to take a video of the rest) to verify this: the iPhone 11 Pro Max on iOS 13 has an additional 50-66ms of latency in its camera preview vs. the iPhone XS Max on iOS 12.4.
I also ran isolated trials of each phone in the same sensor position of the test phone to mitigate any rolling shutter effects, tested with both the 1x and 2x lenses, used exposure locking to isolate auto focus, and turned the screens off and on to break up frame synchronization.
I did this as I was having a subtle-yet-annoying feeling of motion sickness using the iPhone 13 Pro Max camera that I have never experienced with an iPhone before and wanted to be 100% sure I wasn't making it up; a 100ms input latency was already "pushing it": 166ms is "too far".
(LOL: I just noticed the third tweet here said "iPhone 13 Pro Max". I meant "iPhone 11 Pro Max on iOS 13". While I am making corrections: the latency difference I got was more precisely 46-66ms, not 50-66, though the precision I can claim on any of this is pretty weak anyway ;P.)
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Jay Freeman (saurik)
@saurik
About two weeks ago, Apple made a change to their provisioning service to require a different authentication scheme for "free" Apple accounts (they return an error that mentions upgrading to "Xcode 7.3"); this broke Cydia Impactor for users without a paid Apple Developer account.
When Apple did this, I'd just arrived in Florida for a wedding (one of a dear friend and where I was a groomsman); even so, I stayed up ludicrously late the night before the ceremony rehearsal to understand the issue and try to triage how much it would hurt to fix Cydia Impactor.
(I then told myself I shouldn't be working on this at the wedding unless I had a fast fix (which I didn't), was being swamped with an audit deadline at work I needed to hit, frankly hate having to wade into the "eta wen" posts, and honestly wanted to see what other people found.)
Read 12 tweets
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Jay Freeman (saurik)
@saurik
FWIW, it is entirely possible that someone, using techniques I find "sloppy"--the kind of stuff that led to the iOS 11 stability issues (lots of kernel data patches to do stuff like mark processes as being actively debugged) can make A12 work easily--_I_ have no interest in that.
This community operates under a broken concept of software that "anyone can update anything": no, if you are able to update something like Substrate, you can also rewrite it from scratch: jailbreaks and code injection tools are the result of hard research, not engineering effort.
_If_ (yes: "if") I ever release A12 Substrate, it will not only be because I found a good way to achieve the goal that I consider "stable", but it will also be because I have, at least momentarily, come to enjoy the process of working on it again; that might _never_ come to pass.
Read 5 tweets
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Jay Freeman (saurik)
@saurik
So far, I've only had a few days to work on A12 Substrate (something I couldn't even start doing until a few weeks ago, when I was given the first jailbreak build useful for testing with). I do not understand why anyone thinks I am able to spend all of my time on this anymore :(.
For A12, it (surprisingly to me) turned out Pointer Authentication Codes were not a problem; however, Apple built a new layer of codesign--"physical map codesign" (pmap_cs_*, largely missing from the XNU codebase)--as part of their "Page Protection Layer". newosxbook.com/articles/CasaD…
San Bingner, using the awesome emulator environment from @CorelliumHQ, helped me verify my guesses here were correct (debugging into a call to pmap_cs_associate), but I just don't have the time right now to spend reverse engineering and attempting to understand this new logic :(.
Read 6 tweets

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Chris Vickery
@VickerySec
I recently became aware of several generations of iPhone constantly beaming out infrared from behind what appears to be the speaker lattice area next to the front-facing (selfie) camera while running a variety of apps (and possibly while at rest, but still testing that part).
There have been attempts to "explain" this to me, by various twitter commenters, as nothing more than a proximity sensor for the purposes of dimming the screen when the phone is next to your ear during a phone call.
I have doubts about this being a good explanation due to me placing opaque tape over the source of this infrared beam, yet the screen not constantly dimming (which it should if that was correct). Motion detection via accelerometer possibly plays a role in call screen dimming.
Read 6 tweets
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Chris Vickery
@VickerySec
iPhone models before iPhoneX are believed to be non-infrared emitting, right?
That detail has been stated as part of the reason FaceID is not compatible with models before the X.
I have in front of me an iPhone 7 which is emitting IR from the front-facing lense speck. I thought this was not a capability of that model.

The phone itself + mirror shows it in playback, due to the front-facing camera lacking an infrared filter (the back camera filters out IR)
#iPhone enthusiasts, is this common knowledge? (that models prior to X can and do emit infrared from front-facing selfie camera lense area). I thought the capability was introduced with the X.
Read 3 tweets
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University of Lagos
@UnilagNigeria
#HappeningLive The 11th Inaugural Lecture for the 2018/2019 academic session at the J. F. Ade. Ajayi Auditorium. #UnilagNigeria

#Thread
2. Today’s Inaugural Lecturer is a Professor of Chemical and Petroleum Engineering and Director Central Industrial Liaison and Placement Unit (CILPU), Professor Olaosebikan Abidoye Olafadehan, a proud alumnus of the University #UnilagNigeria
3. Prof. Olafadehan is speaking on “Modelling and Simulation: The Under-Tapped Golden Resource and Implications for Process Industries.” #UnilagNigeria
Read 10 tweets
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Gizmodo
@Gizmodo
It's that time again, folks: Apple Day 2019. Let's see what we're gonna get.

Follow along with our livetweets here, and check out the liveblog for even more: bit.ly/2ZQepXv
The opening video is a reminder of Apple's more iconic devices, Mac, iMac, etc. #AppleEvent
Let's get right to it! First up: App Store #AppleDay
Read 84 tweets
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Chilla
@ChillaPharmD
🚨PSA: #iPhone users! Please set up #MedicalID on your phone-we can see your medical info even with your screen locked. This is SO HELPFUL when you come in and are unable to communicate with us after a terrible accident. 🚑😵 It can help save your life! (1/7)
You can put allergies on Medical ID, emergency contacts, medical conditions, medications you take, blood type, any random medical notes, even organ donation status (and if you aren’t registered, you can register super easily through the app! 🙌🏼) (2/7)
I look for it every time we get an unresponsive patient with an iPhone! Most people haven’t filled it out 😢💔 which is sad. Help us take the best care of you! Otherwise, we’re flying blind for quite a while when you first come in. (3/7)
Read 9 tweets
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tolu ogunlesi
@toluogunlesi
Spent the last few days traveling in the SS and SE, visiting FG #Infrastructure projects. What I saw makes me very hopeful about the future of Nigeria.

High point: getting on a boat on River Niger, to watch the amazing work JB is doing on the new Bridge.

#Thread loading soon.
So my #infrastructure journey in the last one week:

Port Harcourt—Ogoniland (Bonny-Bodo Bridges)—Afam (240MW Afam Fast Power Plant—Aba (Ariaria Market Electrification Project—Onitsha/Asaba (Second Niger Bridge)—Warri (Delta Ports)—Itakpe (#ItakpeWarriRail)

#PMBMeansBusiness
The 1st site I visited: the Bonny-Bodo Bridges and Road Project in Ogoniland

Scope: 3 main bridges (across Afa Creek, Opobo Channel & Nanabie Creek) + Road —38km Total — connecting Bodo on Mainland to Bonny Island

Flagged-off by @ProfOsinbajo Oct2017, ~40 years after conception
Read 25 tweets

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