3 ms·

Afaik, 10ms is not achievable nowadays, unless you use a very old computer. https://danluu.com/input-lag/ https://danluu.com/input-lag/

by yoz-y 8y ago

userbinator 8y ago
I'd be curious to see the original IBM PC/XT/AT tested too. I guess it would be near the low end of the list too. Also, the last entry in the list provides another reason why Lisp machines never became popular --- 300ms of input lag! That's definitely in unusable territory, especially when other machines of the time were almost an order of magnitude faster.
- lispm 8y ago
  If you look at the table you'll see that the 3620 from Symbolics in 1986 was an entirely different system. It had a megapixel bitmap-only screen as a separate console (which had mouse, keyboard, serial and an audio interface) with console cables often of 30 meters. The refrigerator size machines often would be running in some machine room and the console would be used in some office room. The console was handled by a separate Front End Processor with a communication protocol over the console cable. An entirely different technology for a different setup. Later Symbolics Lisp machines used different technology for the graphics system, but basically the same console setup. See here for some more info about the 3620: http://lispm.de/3620/3620.html http://lispm.de/3620/3620.html
half-kh-hacker 8y ago
> For desktop results, results are measured from when the key started moving until the screen finished updating When the key starts moving and when the key actually actuates are very different times. Some of this latency could be key travel time. This is also a methodical issue I found with his [keyboard latency test](https://danluu.com/keyboard-latency/ https://danluu.com/keyboard-latency/).
- 1996 8y ago
  Do you have any recommendation to get at least a decent latency (< 30 ms) on linux or windows 10? The least infuriating to me is lxterm. Consoles (no X) used to feel ok several years ago, but now I use fbuffer it feels slower (and I can't do without because high screen resolutions make fonts tiny, even with setfont)

Afaik, 10ms is not achievable nowadays, unless you use a very old computer. https://danluu.com/input-lag/ https://danluu.com/input-lag/

by yoz-y 8y ago

Afaik, 10ms is not achievable nowadays, unless you use a very old computer. https://danluu.com/input-lag/ https://danluu.com/input-lag/

userbinator 8y ago

I'd be curious to see the original IBM PC/XT/AT tested too. I guess it would be near the low end of the list too. Also, the last entry in the list provides another reason why Lisp machines never became popular --- 300ms of input lag! That's definitely in unusable territory, especially when other machines of the time were almost an order of magnitude faster.

lispm 8y ago
If you look at the table you'll see that the 3620 from Symbolics in 1986 was an entirely different system. It had a megapixel bitmap-only screen as a separate console (which had mouse, keyboard, serial and an audio interface) with console cables often of 30 meters. The refrigerator size machines often would be running in some machine room and the console would be used in some office room. The console was handled by a separate Front End Processor with a communication protocol over the console cable. An entirely different technology for a different setup. Later Symbolics Lisp machines used different technology for the graphics system, but basically the same console setup. See here for some more info about the 3620: http://lispm.de/3620/3620.html http://lispm.de/3620/3620.html

half-kh-hacker 8y ago

> For desktop results, results are measured from when the key started moving until the screen finished updating When the key starts moving and when the key actually actuates are very different times. Some of this latency could be key travel time. This is also a methodical issue I found with his [keyboard latency test](https://danluu.com/keyboard-latency/ https://danluu.com/keyboard-latency/).

1996 8y ago
Do you have any recommendation to get at least a decent latency (< 30 ms) on linux or windows 10? The least infuriating to me is lxterm. Consoles (no X) used to feel ok several years ago, but now I use fbuffer it feels slower (and I can't do without because high screen resolutions make fonts tiny, even with setfont)