Frames and Input Judging — the 60Hz Grid and Input Lag
What “one-frame just input” means, and how a browser practice tool measures it.
What a frame is
Tekken runs at 60 frames per second. One frame is about 16.67ms, and startup, recovery and frame advantage are all given in frames. A “just” move like the EWGF needs two inputs in the same frame. Two inputs close in time can still fail if they straddle a frame boundary, and two a little further apart succeed if they fall in the same frame.
Mishima Dojo's 60Hz grid
Mishima Dojo places the input times the browser records on a shared 60Hz grid.
- The keyboard uses the key event time; a gamepad uses the time the pad reports.
- Each time is rounded to the nearest 16.67ms cell.
- Two inputs with the same cell number are in the same frame.
This differs from “success if the gap is under N ms”. A 5ms gap across a cell boundary is two frames; a 12ms gap inside one cell is one frame. The game also reads input per frame, so this is closer to how the game behaves. The grid does not depend on your monitor's refresh rate, so a 144Hz screen uses the same standard.
Why it is not identical to the game
A browser cannot see the game's frame timing, so the site's grid and the game's grid are offset from each other. An input near a boundary can succeed here and fail in the game, or the other way round. What matters is your success rate and error distribution over many tries, not a single result. A high rate with errors clustered near 0 carries over to the game.
Timing error by device
| Device | Character | Tip |
|---|---|---|
| Keyboard / leverless | Key event times are fairly accurate, and chords are easy. | A diagonal is two keys: hold down first, then press forward. |
| Gamepad | The browser reads the pad periodically, which can add a few ms of error. | The d-pad has cleaner direction boundaries than an analogue stick. |
| Stick | Usually recognised as a gamepad. Passing between directions easily registers stray diagonals. | Directions and buttons can be remapped in settings. |
| Phone touch | On-screen touch buttons. | Precision is low; use it only to learn the shape of an input. |
Reading the input log
The input log on the left of the practice screen lists the newest input at the top. Inputs in the same 60Hz cell share one line, so ↘+2 means d/f and button 2 were in the same frame. A direction line shows how many frames it was held; a button-only line shows the gap from the previous input. If an EWGF came out as a WGF, you will see ↘ and +2 on separate lines.
Reducing error
- Close heavy tabs and programs while practising. A busy browser can handle input events late.
- Use a wired connection for wireless pads when you can.
- Keep laptops on mains power to avoid power-saving delays.