5 ms·
> Apple Pencil latency is dropping from 20ms to 9ms, This is why I respect Apple. Most tech forums would have been flooded people whinging about how mere human
by davemp 7y ago
> Apple Pencil latency is dropping from 20ms to 9ms,
This is why I respect Apple. Most tech forums would have been flooded people whinging about how mere humans can’t perceive such low latencies and how improving them is a waste. Meanwhile Apple knows not to leave anything on the table for UX.
- headsoup 7y agoActually I think it highlights how well Apple manage their message and keep people focused on them: most people probably don't notice or actually care about the difference in latency, and 9ms is not the best in the market, yet it becomes a 'good news story' validating Apple
- azinman2 7y agoWho is faster?
- michelb 7y agoCurious about this as well..Surface Pro has 21 ms in best conditions I think, depending on the app.
- HugoDaniel 7y agoLatencies bellow 16ms require a refresh rate higher than 60Hz. For 9ms you need at least 90Hz. Don't know many who do that. Specially if you take in consideration the battery hit that the faster update rate requires.
- anbop 7y agoiPad Pro refresh rate is 120hz.
- oceanplexian 7y agoYeah I was going to say. The iPad Pro display has a 120hz refresh rate and it's highly noticeable, and IMHO far superior to any other mobile device display.
- tinus_hn 7y agoIf you’re clever you only have the higher refresh rate while drawing or animating, so the battery hit is limited.
- iSnow 7y agoApple has the technology in place for that: https://www.gsmarena.com/understanding_apples_promotion_display_on_the_new_ipad_pro-news-25446.php https://www.gsmarena.com/understanding_apples_promotion_disp....
- sobani 7y agoDon't those latencies add up? In the worst case 60Hz + this new pen will add up to (16 + 9) 15ms of latency, right? If the screen refreshes at T=0,16,33,50 and you create input at T=8 then the input will be processed at T=17 (8+9), so you will need to wait for T=33 before it show up for a total latency of 25ms (33-8). Which is a lot better than the potential total latency of 36ms with a 20ms pen.
- georgyo 7y agoPeople seem to be down voting without explaining. Refresh rate isn't latency. Though you are right that you do have to wait for the screen to redraw. There is screen latency as a completely separate number though, and those would add up. Many lcd monitors can have up to a 20ms latency. And those numbers would add up like you suggest. It's why gaming monitors can charge a bunch for their 1ms latency at 60hz. It is also possible to have 120hz and 20ms latency. The numbers are not related. I don't know what the iPads screen latency is.
- sobani 7y agoWell I didn't even consider any latency of the screen itself. But someone please explain how a refresh rate less than infinity doesn't create some sort of delay. In my naive understanding a 60Hz monitor means it refreshes the screen every 16ms. If you miss one refresh, you'll have to wait 16ms for the next one. This would be an extra 16ms it takes between moving the pen and seeing the reaction, right?
- ghusbands 7y agoNo, refresh rate directly affects latency. At a refresh rate of 60Hz (without gsync/freesync), with input arriving at arbitrary times, you have an average of half a frame (and a maximum of a whole frame) of unavoidable latency, above and beyond whatever other latency may exist. If you have enough control over your devices, you can arrange for your input to arrive at just the right time to be included in each frame without extra latency, though. The kind of latency you describe is that internal to the display; it could be called the video-signal-to-photon latency. The parent you're replying to is explaining the action-to-video-signal and compute-to-video-signal latency, and its effects on the action-to-photon latency.
- coldtea 7y ago>and 9ms is not the best in the market Really, who does it better? This is already < 60hz, so we're talking about 120 hz devices to begin with...
- ksec 7y agoI am guessing this is pure Input latency? what I want to know is End to End latency, from Input > OS > Display. I wonder if we will ever get sub 5ms in End to End Latency.
- coldtea 7y agoWhy would it be important to know? Previous situation was already industry best (comparing other tables, Wacom, etc), the new one is several ms better.
- georgyo 7y agoAmazing. The top level comment is about improving performance even when many people say it isn't important. Someone says it would be nice to get even lower, and you say it isn't important. Full circle in three comments.
- coldtea 7y agoYeah, wrong. Someone said "I want to know end to end latency", to which I comment that it isn't important to know this to consider this a positive improvement, given that there's a measurable marked reduction in latency. Never said improving performance isn't important. Maybe read the comments carefully top to bottom once more after the morning coffee?
- Eldt 7y ago> Someone said "I want to know end to end latency", to which I comment that it isn't important to know this to consider this a positive improvement, given that there's a measurable marked reduction in latency. It might not be necessary information to know to understand that an improvement was made, but knowing the end to end latency would be interesting to see. The gp expressed an interest in the end to end latency and you responded with a dismissive comment which didn't answer their question.
- 7y ago