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On May 29, 2014 9:25:05 PM GMT+03:00, Praful Kapadia <praful...@gmail.com>
wrote:
>I have had an annoying issue with gvim 7.4, with patches 1-307. If I
>open a large file (e.g. containing 200,000 lines) and use the global
>command to delete lines, the operation takes a very long time on
>Windows if clipboard has been set to unnamed. I'm assuming it's the
>constant copying of deleted lines to the Windows clipboard that's
>slowing gvim down.
>
>I use Windows 7 64-bit. I have compiled gvim 64-bit using ming. The
>issue occurs on gvim 64-bit, 32-bit and, to a lesser extent, on MacVim.
>
>
>On Windows, it takes several minutes to carry out the operation. During
>this time, Windows becomes unusable, which is poor but that's another
>issue.
>
>On OS X, in MacVim, the same operation takes 30 seconds. With
>clipboard="", it takes two seconds.
Do not mislead yourself. '"' character starts a comment, so
set clipboard=""
is equivalent to
set clipboard="unnamed"
which is really (after you strip comment)
set clipboard=
. There is also no need to balance quotes:
set clipboard="unnamed
means the same thing. Use
let &clipboard="..."
syntax if you want '"' to start a string and not a comment.
>
>Here are the steps to reproduce the issue:
>
>1. Open gvim with no plugins and no vimrc.
>2. :set clipboard=unnamed
>3. Open a text file with about 200,000 lines.
>4. Enter :g/string/d The "string" should match about 150,000
>lines i.e. you want to delete lots of rows!
If you do not need to *cut* lines (any Vim delete operation cuts by default)
you need to use black hole register: "delete _" in place of just "delete" ("d"
is the short form of it).
>5. Go for a coffee break (Windows!) or wait 30 seconds (OS X)
>
>In practice, if I issue the command on Windows, I kill the process then
>open the file again, this time setting clipboard="" before I issue the
>command.
>
>The workaround (:set clipboard="") is fine if you remember it! It would
>be nice if gvim did this e.g. (pseudo-code):
>
> old_clipboard = clipboard
> try
> clipboard = ""
> execute global command
> finally
> clipboard = old_clipboard
> end
>
>One consideration for side effects: currently, if clipboard=unnamed,
>the only text that ends up on the system clipboard is the final deleted
>line, not all deleted lines. If anything, you might want all deleted
>text to be on the clipboard but that is not what currently happens. I
>suspect neither the last line nor all lines is generally required. I
>don't care (others might) what ends up on the clipboard and would be
>happy if there was no speed penalty when the command was issued!
>
>It would be great if someone could look at this!
>
>Thanks
>
>Praful
>
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