[gnome-text-editor] spellcheck: short-circuit known spaces

[Christian Hergert <chergert src gnome org>]

commit 2d3d3ddedabe00755a7f22803e6ff37f431cc200
Author: Christian Hergert <chergert redhat com>
Date:   Sun Jul 18 10:07:37 2021 -0700

    spellcheck: short-circuit known spaces
    
    We want to avoid iterating the full list of extra_word_chars (which can
    be quite long) for very common stuff.

 src/editor-spell-cursor.c | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/src/editor-spell-cursor.c b/src/editor-spell-cursor.c
index 52e6df4..52731f3 100644
--- a/src/editor-spell-cursor.c
+++ b/src/editor-spell-cursor.c
@@ -155,6 +155,10 @@ is_extra_word_char (const GtkTextIter *iter,
 {
   gunichar ch = gtk_text_iter_get_char (iter);
 
+  /* Short-circuit for known space */
+  if (ch == ' ' || ch == '\n' || ch == '\t' || ch == '\r')
+    return FALSE;
+
   for (const char *c = extra_word_chars; *c; c = g_utf8_next_char (c))
     {
       if (ch == g_utf8_get_char (c))