JS convert milliseconds to wpm (typing speed)

Question

JS convert millisecond delays to WPM

So the goal in this is to ... user enters x WPM, and a text / string is typed with that speed (wpm).

WPM = words per minute (typing speed)

I have my own calculation, you’ll see it in the code

The problem is: above 100WPM, it doesn’t seem to be working (the wpm you enter looks a lot slower than what it should).

So, I’m wondering if you guys have a formula for this, or if you think I need to change something in my calculation.

(Explained more in the code)

...

Answer 1

In this line

(100 * 5) / speed / (100 / 2.2);

Change it to a constant dividing speed.

Also, a time interval too small, such as 2ms, is invalid, because the calculation in each frame takes up time.

Answer 2

means don't do unnecessary calculation in each iteration.

you should calculate 100 * 5 / 100 * 2.2 manually first, and then in your code you divide this calculated result by speed.

Answer 3

—- z code
https://code.sololearn.com/WOZ0TZq5XLec/?ref=app

Answer 4

Gordon what is constant dividing speed?
like ... 2 instead of 2.2?

Answer 5

that new approach takes up even more time...

You should do less calculations in each frame, like this:

let wpm = 100;
let interval = 600000 / word;

interval doesn't work for interval lower than 10.

Check my demo code in this thread :
https://www.sololearn.com/Discuss/1690442/?ref=app

it is unavoidable, because of the time needed to process the operations in each frame.

Answer 6

Gordon ahh i see.

Let’s do the calculation without the ...interval()

In this ... formula
// 0.0001 = about 1000 (or more) wpm
// 0.01 = about 500 wpm
// 0.1 = about 100 wpm
// 1 = about 10 wpm
// 11 = about 1 wpm (minimum)

https://code.sololearn.com/WOZ0TZq5XLec/?ref=app

I can probably fix the interval later if I can get the calculation right.

var inDelay = speed / (speed * (0.01 * speed)) / (0.1 * speed

the 0.01 is 1* of the speed.
And 0.1 is 10% of the speed.

Answer 7

@Gordon
Let's try a different calculation:

// 0.0001 = about 1000 (or more) wpm
// 0.001 = about 900
// 0.01 = about 500 wpm
// 0.1 = about 100 wpm
// 1 = about 10 wpm
// 11 = about 1 wpm (minimum)

This is the new calculation I came up with, and it kinda...works for the bigger numbers, not for the smaller numbers like.. 1, 2, 3..

This is the new calculation:
var inDelay = speed / (speed * (0.01 * speed)) / (0.1 * speed)

https://code.sololearn.com/WWYcxxXWZZlA/#js

And this is the original (just in case we need to use this one instead of the new one)

https://code.sololearn.com/WOZ0TZq5XLec/?ref=app#js