It's what i used to do to, and i appreciated to replace

Alt+Tab - Up - Enter (and Alt+Tab to return to editor)
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by simply

;r
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Especially because before running the script, if there is any compiling error, it automatically opens a new tab and jumps to the first error. And then i have a shortcut to jump to the next compiling error.
If there is no compiling error it just runs the script.

So, if there was a way to keep this feature, without this annoying Vim freeze when executing a script, i would love it.

And i would really like to avoid having to switch to Emacs, right now.

Idea for a possible solution : if there was a terminal out there, which can be given commands through another terminal's commands, then i could "drive" it from Vim. That would do the trick. Is such a set up possible ?

There must be a simple way...