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Re: Strange slowness when killing words interactively

From: David De La Harpe Golden
Subject: Re: Strange slowness when killing words interactively
Date: Wed, 04 May 2011 06:36:59 +0100
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20110402 Icedove/3.1.9

On 03/05/11 12:51, Taylor Venable wrote:

Is there any chance he's using Motif?  The Motif clipboard protocol is
capable of producing delays that even the US immigration service would

No, this is using the GTK interface. :-)

You mean emacs itself? It's more if you were running emacs on a motif/cde desktop (or maybe just one with an xclipboard hanging about).

** What desktop environment (KDE, GNOME, XFCE, etc.), if any, are you using?

** Come to think of it, what does this:
(x-selection-exists-p 'CLIPBOARD_MANAGER)
return in your emacs?

GNOME - and apparently now recent XFCE - do actually have tiny clipboard managers by default (embedded in gnome-settings-daemon and xfce4-settings-helper respectively), but AFAIUI they shouldn't be problematic like motif-era ones: Nowadays there is a protocol [1] for clients to ask a clipboard manager only at client exit time to copy the clipboard content and take over clipboard ownership from the client, to persist the clipboard after client exit, and those managers are about supporting those clients. I only recently learned of the XFCE one and haven't really looked at it yet, though.

Actually, I think emacs is not doing its part of [1], though it shouldn't typically have negative effects except when you try to paste after copying in emacs and then quitting, so not directly related to your problem. But I'm now looking at that "Clipboard managers are encouraged to use this information to support legacy clients" line in [1] - maybe there might be a clipboard manager out there that grabs clipboard contents from "legacy clients" eagerly but avoids pestering the clients that indicate their support of the spec. That would mean even "legacy client" clipboard contents wouldn't lost when they exit ...but "legacy client" performance would be degraded.

[1] http://www.freedesktop.org/wiki/ClipboardManager

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