Copy text in huge table(couple hundred rows) take more time than usual

Summary:
Copying text in huge table takes more time than usual. The slowness starting to appear copying text into row #500 and above.

Step to reproduce:

1. Fresh install Confluence 6.2.4
2. Copy the Storage Format in a page
3. Start copying the date/text into new row in the huge table

Expected Behavior

1. No slowness will appear between the moment you push the CTRL + V and the moment of copied text appears in the table.

Actual Behavior

1. Slowness will appear between the moment you push the CTRL + V and the moment of copied text appears in the table
   6.2.4.mp4

Resolution

Tested out on 6.3.4 and it looks like the issue resolved in this version.
6.3.4.mp4