diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index 62621bf..df6700d 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -5514,7 +5514,15 @@
 	    smsg((char_u *)_("Pattern not found: %s"), pat);
     }
     else
+    {
+#ifdef FEAT_CLIPBOARD
+	start_global_changes();
+#endif
 	global_exe(cmd);
+#ifdef FEAT_CLIPBOARD
+	end_global_changes();
+#endif
+    }
 
     ml_clearmarked();	   /* clear rest of the marks */
     vim_regfree(regmatch.regprog);
diff --git a/src/ex_cmds2.c b/src/ex_cmds2.c
index c502ff8..908552d 100644
--- a/src/ex_cmds2.c
+++ b/src/ex_cmds2.c
@@ -2464,6 +2464,9 @@
 	 * great speed improvement. */
 	save_ei = au_event_disable(",Syntax");
 #endif
+#ifdef FEAT_CLIPBOARD
+    start_global_changes();
+#endif
 
     if (eap->cmdidx == CMD_windo
 	    || eap->cmdidx == CMD_tabdo
@@ -2591,6 +2594,9 @@
 					       curbuf->b_fname, TRUE, curbuf);
     }
 #endif
+#ifdef FEAT_CLIPBOARD
+    end_global_changes();
+#endif
 }
 
 /*
@@ -2750,8 +2756,8 @@
  * used.
  * Returns OK when at least one match found, FAIL otherwise.
  *
- * If "name" is NULL calls callback for each entry in runtimepath. Cookie is 
- * passed by reference in this case, setting it to NULL indicates that callback 
+ * If "name" is NULL calls callback for each entry in runtimepath. Cookie is
+ * passed by reference in this case, setting it to NULL indicates that callback
  * has done its job.
  */
     int
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 083693b..ba764bf 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -11534,6 +11534,10 @@
 {
     linenr_T	lnum;
 
+#ifdef FEAT_CLIPBOARD
+    start_global_changes();
+#endif
+
     /* First set the marks for all lines closed/open. */
     for (lnum = eap->line1; lnum <= eap->line2; ++lnum)
 	if (hasFolding(lnum, NULL, NULL) == (eap->cmdidx == CMD_folddoclosed))
@@ -11542,5 +11546,8 @@
     /* Execute the command on the marked lines. */
     global_exe(eap->arg);
     ml_clearmarked();	   /* clear rest of the marks */
+#ifdef FEAT_CLIPBOARD
+    end_global_changes();
+#endif
 }
 #endif
diff --git a/src/globals.h b/src/globals.h
index 77528c7..ce831f3 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -533,6 +533,8 @@
 EXTERN int	clip_autoselectml INIT(= FALSE);
 EXTERN int	clip_html INIT(= FALSE);
 EXTERN regprog_T *clip_exclude_prog INIT(= NULL);
+EXTERN int	clip_did_set_selection INIT(= TRUE);
+EXTERN int	clip_unnamed_saved INIT(= 0);
 #endif
 
 /*
diff --git a/src/ops.c b/src/ops.c
index 265cf3a..2b40091 100644
--- a/src/ops.c
+++ b/src/ops.c
@@ -1597,9 +1597,15 @@
 {
     /* If no reg. specified, and "unnamed" or "unnamedplus" is in 'clipboard',
      * use '*' or '+' reg, respectively. "unnamedplus" prevails. */
-    if (*rp == 0 && clip_unnamed != 0)
-	*rp = ((clip_unnamed & CLIP_UNNAMED_PLUS) && clip_plus.available)
+    if (*rp == 0 && (clip_unnamed != 0 || clip_unnamed_saved != 0))
+    {
+	if (clip_unnamed != 0)
+	    *rp = ((clip_unnamed & CLIP_UNNAMED_PLUS) && clip_plus.available)
 								  ? '+' : '*';
+	else
+	    *rp = ((clip_unnamed_saved & CLIP_UNNAMED_PLUS) && clip_plus.available)
+								  ? '+' : '*';
+    }
     if (!clip_star.available && *rp == '*')
 	*rp = 0;
     if (!clip_plus.available && *rp == '+')
@@ -3203,7 +3209,7 @@
     if (clip_star.available
 	    && (curr == &(y_regs[STAR_REGISTER])
 		|| (!deleting && oap->regname == 0
-					   && (clip_unnamed & CLIP_UNNAMED))))
+		   && ((clip_unnamed | clip_unnamed_saved) & CLIP_UNNAMED))))
     {
 	if (curr != &(y_regs[STAR_REGISTER]))
 	    /* Copy the text from register 0 to the clipboard register. */
@@ -3224,7 +3230,8 @@
     if (clip_plus.available
 	    && (curr == &(y_regs[PLUS_REGISTER])
 		|| (!deleting && oap->regname == 0
-				      && (clip_unnamed & CLIP_UNNAMED_PLUS))))
+		  && ((clip_unnamed | clip_unnamed_saved) &
+		      CLIP_UNNAMED_PLUS))))
     {
 	if (curr != &(y_regs[PLUS_REGISTER]))
 	    /* Copy the text from register 0 to the clipboard register. */
diff --git a/src/proto/ui.pro b/src/proto/ui.pro
index 234e99f..4100aa7 100644
--- a/src/proto/ui.pro
+++ b/src/proto/ui.pro
@@ -14,6 +14,8 @@
 void clip_update_selection __ARGS((VimClipboard *clip));
 void clip_own_selection __ARGS((VimClipboard *cbd));
 void clip_lose_selection __ARGS((VimClipboard *cbd));
+void start_global_changes __ARGS((void));
+void end_global_changes __ARGS((void));
 void clip_auto_select __ARGS((void));
 int clip_isautosel_star __ARGS((void));
 int clip_isautosel_plus __ARGS((void));
diff --git a/src/ui.c b/src/ui.c
index db13555..21d92f0 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -558,6 +558,51 @@
 }
 
 /*
+ * Save and restore clip_unnamed before doing possibly many changes. This
+ * prevents accessing the clipboard very often which might slow down Vim
+ * considerably.
+ */
+
+/*
+ * Save clip_unnamed and reset it.
+ */
+    void
+start_global_changes()
+{
+    clip_unnamed_saved = clip_unnamed;
+
+    if (clip_did_set_selection)
+    {
+	clip_unnamed = FALSE;
+	clip_did_set_selection = FALSE;
+    }
+}
+
+/*
+ * Restore clip_unnamed and set the selection when needed.
+ */
+    void
+end_global_changes()
+{
+    if (!clip_did_set_selection)
+    {
+	clip_did_set_selection = TRUE;
+	clip_unnamed = clip_unnamed_saved;
+	if (clip_unnamed & CLIP_UNNAMED)
+	{
+	    clip_own_selection(&clip_star);
+	    clip_gen_set_selection(&clip_star);
+	}
+	if (clip_unnamed & CLIP_UNNAMED_PLUS)
+	{
+	    clip_own_selection(&clip_plus);
+	    clip_gen_set_selection(&clip_plus);
+	}
+    }
+    clip_unnamed_saved = FALSE;
+}
+
+/*
  * Called when Visual mode is ended: update the selection.
  */
     void
@@ -1428,6 +1473,15 @@
 clip_gen_set_selection(cbd)
     VimClipboard	*cbd;
 {
+    if (!clip_did_set_selection)
+    {
+	/* Updating postponed, so that accessing the system clipboard won't
+	 * hang Vim when accessing it many times (e.g. on a :g comand). */
+	if (cbd == &clip_plus && (clip_unnamed_saved & CLIP_UNNAMED_PLUS))
+	    return;
+	else if (cbd == &clip_star && (clip_unnamed_saved & CLIP_UNNAMED))
+	    return;
+    }
 #ifdef FEAT_XCLIPBOARD
 # ifdef FEAT_GUI
     if (gui.in_use)
diff --git a/src/version.c b/src/version.c
index aa64155..312e4ab 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    396,
+/**/
     395,
 /**/
     394,