in reply to Re: Second background process is pausing the gui
in thread Second background process is pausing the gui

But if you replace one of the shell loops with find, it hangs again until the find finishes.
map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

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Re^3: Second background process is pausing the gui
by tybalt89 (Monsignor) on Jun 12, 2020 at 16:49 UTC

    I don't see that on my system.

    I did replace the second shell command with xterm -e htop and it did pop up a new xterm running htop while still filling in the first text widget, exactly as expected.

[reply]
[d/l]
      You can watch it here (YouTube warning!)

      Interestingly, when I click into the area to be filled, the application responds, but it immediately gets stuck again.

      map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]
[reply]
[d/l]

        Best guess so far: you are dumping (hundreds of)? thousands of lines into the text widget. This is what is taking time.

        Sort of confirmed, instead of just 'find' try 

        q( find / 2>/dev/null | perl -pe '$| = 1; select undef, undef, undef, 
+0.01' )

        [download]
        This feeds in the lines just a little slower :)

[reply]
[d/l]
[select]

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