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Manipulate bits more efficiently

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The function to translate GtkCssChange enum values to the PARENT
ones is called very frequently. This patch speeds it up tremendously.
The callgrind instruction count for this function in the listbox
demo goes from 108M to 7M.
This commit is contained in:
Matthias Clasen 2015-09-09 14:00:49 -04:00
parent a9481cb410
commit d7dd6eccd5
1 changed files with 19 additions and 21 deletions
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40
gtk/gtkcsstypes.c
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@ -70,28 +70,26 @@ _gtk_css_change_for_sibling (GtkCssChange match)
GtkCssChange
_gtk_css_change_for_child (GtkCssChange match)
{
static const GtkCssChangeTranslation table[] = {
{ GTK_CSS_CHANGE_CLASS, GTK_CSS_CHANGE_PARENT_CLASS },
{ GTK_CSS_CHANGE_NAME, GTK_CSS_CHANGE_PARENT_NAME },
{ GTK_CSS_CHANGE_ID, GTK_CSS_CHANGE_PARENT_ID },
{ GTK_CSS_CHANGE_FIRST_CHILD, GTK_CSS_CHANGE_PARENT_FIRST_CHILD },
{ GTK_CSS_CHANGE_LAST_CHILD, GTK_CSS_CHANGE_PARENT_LAST_CHILD },
{ GTK_CSS_CHANGE_NTH_CHILD, GTK_CSS_CHANGE_PARENT_NTH_CHILD },
{ GTK_CSS_CHANGE_NTH_LAST_CHILD, GTK_CSS_CHANGE_PARENT_NTH_LAST_CHILD },
{ GTK_CSS_CHANGE_STATE, GTK_CSS_CHANGE_PARENT_STATE },
{ GTK_CSS_CHANGE_SIBLING_CLASS, GTK_CSS_CHANGE_PARENT_SIBLING_CLASS },
{ GTK_CSS_CHANGE_SIBLING_NAME, GTK_CSS_CHANGE_PARENT_SIBLING_NAME },
{ GTK_CSS_CHANGE_SIBLING_ID, GTK_CSS_CHANGE_PARENT_SIBLING_ID },
{ GTK_CSS_CHANGE_SIBLING_FIRST_CHILD, GTK_CSS_CHANGE_PARENT_SIBLING_FIRST_CHILD },
{ GTK_CSS_CHANGE_SIBLING_LAST_CHILD, GTK_CSS_CHANGE_PARENT_SIBLING_LAST_CHILD },
{ GTK_CSS_CHANGE_SIBLING_NTH_CHILD, GTK_CSS_CHANGE_PARENT_SIBLING_NTH_CHILD },
{ GTK_CSS_CHANGE_SIBLING_NTH_LAST_CHILD, GTK_CSS_CHANGE_PARENT_SIBLING_NTH_LAST_CHILD },
{ GTK_CSS_CHANGE_SIBLING_STATE, GTK_CSS_CHANGE_PARENT_SIBLING_STATE },
{ GTK_CSS_CHANGE_SOURCE, 0 },
{ GTK_CSS_CHANGE_PARENT_STYLE, 0 }
};
#define BASE_STATES ( GTK_CSS_CHANGE_CLASS \
| GTK_CSS_CHANGE_NAME \
| GTK_CSS_CHANGE_ID \
| GTK_CSS_CHANGE_FIRST_CHILD \
| GTK_CSS_CHANGE_LAST_CHILD \
| GTK_CSS_CHANGE_NTH_CHILD \
| GTK_CSS_CHANGE_NTH_LAST_CHILD \
| GTK_CSS_CHANGE_STATE \
| GTK_CSS_CHANGE_SIBLING_CLASS \
| GTK_CSS_CHANGE_SIBLING_NAME \
| GTK_CSS_CHANGE_SIBLING_ID \
| GTK_CSS_CHANGE_SIBLING_FIRST_CHILD \
| GTK_CSS_CHANGE_SIBLING_LAST_CHILD \
| GTK_CSS_CHANGE_SIBLING_NTH_CHILD \
| GTK_CSS_CHANGE_SIBLING_NTH_LAST_CHILD \
| GTK_CSS_CHANGE_SIBLING_STATE )
return gtk_css_change_translate (match, table, G_N_ELEMENTS (table));
#define PARENT_SHIFT 16
return (match & ~(BASE_STATES|GTK_CSS_CHANGE_SOURCE|GTK_CSS_CHANGE_PARENT_STYLE)) | ((match & BASE_STATES) << PARENT_SHIFT);
}
void