Keyboard scrolling is slow

Tags: #<Tag:0x00007efc60ceb5b8>
#1

Hi,

Keyboard scrolling is slow when hot width and height are large.
In the example below, when i press down key and hold it the cursor in the table start scrolling.
But hot doesn’t refresh the scrolled screen until i stop holding the down key.

I tested with i5 cpu, windows 10, chrome.

https://jsfiddle.net/futurecrew/2ed71jpa/2/

#2

Hey @futurecrew

can you record what you see?

#3

Hi @futurecrew

I’ve tested it over and it seems that the vertical scrolling is a bit slower than the horizontal.

Can you test if the beta1 works faster for you https://jsfiddle.net/AMBudnik/a0vbhenL/ It seems faster.

#4

Hi,
I’ve tested ‘8.0.0-beta.1’ with no luck.

In my PC (i5 cpu) there is no screen scrolling when i hold pressing the down key.
And the updated screen displays when i release the down key. (in both v7.4.2 and 8.0.0-beta.1)

In my another PC (i7 cpu) there is no such problem.
With v7.4.2 or 8.0.0-beta.1, it scrolls well when i hold pressing the down key.

Thank you.

#5

Can you record it please?

#6

i upload the ‘slow ui update’ issue.
it was recorded in i5 cpu.

“http://www.nprime.co.kr/wp-content/uploads/2020/04/slow_ui_update.mp4”

thank you

#7

Thank you for the recording. I will test it today on two different systems and share my findings.

#8

Here’s what I get when I use the same demo as above

0beta1-ff-macos

Tested on macOS Catalina, FF and Chrome give the same result.

However, if I change the dimensions of the Handsontable to fir the viewport it works well
defined-width-height-within-the-viewport
https://jsfiddle.net/AMBudnik/L25usxe0/

#9