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match_all: Only allocate an array when needed

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My statistics show that more than half of all calls end up
with 0 matches, so we can avoid some overhead by not allocating
an array at all in this case.
This commit is contained in:
Matthias Clasen 2015-09-09 11:08:43 -04:00
parent 2d29ae4159
commit a9481cb410
1 changed files with 8 additions and 7 deletions
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15
gtk/gtkcssselector.c
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@ -159,8 +159,8 @@ g_ptr_array_insert_sorted (GPtrArray *array,
}
static void
gtk_css_selector_tree_found_match (const GtkCssSelectorTree *tree,
GPtrArray *array)
gtk_css_selector_tree_found_match (const GtkCssSelectorTree *tree,
GPtrArray **array)
{
int i;
gpointer *matches;
@ -168,8 +168,11 @@ gtk_css_selector_tree_found_match (const GtkCssSelectorTree *tree,
matches = gtk_css_selector_tree_get_matches (tree);
if (matches)
{
if (!*array)
*array = g_ptr_array_sized_new (16);
for (i = 0; matches[i] != NULL; i++)
g_ptr_array_insert_sorted (array, matches[i]);
g_ptr_array_insert_sorted (*array, matches[i]);
}
}
@ -1757,15 +1760,13 @@ GPtrArray *
_gtk_css_selector_tree_match_all (const GtkCssSelectorTree *tree,
const GtkCssMatcher *matcher)
{
GPtrArray *array;
GPtrArray *array = NULL;
update_type_references ();
array = g_ptr_array_sized_new (16);
for (; tree != NULL;
tree = gtk_css_selector_tree_get_sibling (tree))
gtk_css_selector_foreach (&tree->selector, matcher, gtk_css_selector_tree_match_foreach, array);
gtk_css_selector_foreach (&tree->selector, matcher, gtk_css_selector_tree_match_foreach, &array);
return array;
}