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gobject: Speed up g_type_from_name()

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The hash table used exclusively for looking up types by name used to map
quarks => types. But we can easily make it map strings => types, which
avoids the quark lookup. And that in trun avoids taking a lock and
consulting another hash table. So this change should make
g_type_from_name() roughly twice as fast.
This commit is contained in:
Benjamin Otte 2011-05-17 14:58:39 +02:00
parent aeac5de2f8
commit d9440687ff
1 changed files with 5 additions and 13 deletions
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18
gobject/gtype.c
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@ -81,10 +81,6 @@
* not ->supers[]), as all those memory portions can get realloc()ed during
* callback invocation.
*
* TODO:
* - g_type_from_name() should do an ordered array lookup after fetching the
* the quark, instead of a second hashtable lookup.
*
* LOCKING:
* lock handling issues when calling static functions are indicated by
* uppercase letter postfixes, all static functions have to have
@ -492,7 +488,7 @@ type_node_any_new_W (TypeNode *pnode,
node->global_gdata = NULL;
g_hash_table_insert (static_type_nodes_ht,
GUINT_TO_POINTER (node->qname),
g_quark_to_string (node->qname),
(gpointer) type);
return node;
}
@ -3328,13 +3324,9 @@ g_type_from_name (const gchar *name)
g_return_val_if_fail (name != NULL, 0);
quark = g_quark_try_string (name);
if (quark)
{
G_READ_LOCK (&type_rw_lock);
type = (GType) g_hash_table_lookup (static_type_nodes_ht, GUINT_TO_POINTER (quark));
G_READ_UNLOCK (&type_rw_lock);
}
G_READ_LOCK (&type_rw_lock);
type = (GType) g_hash_table_lookup (static_type_nodes_ht, name);
G_READ_UNLOCK (&type_rw_lock);
return type;
}
@ -4308,7 +4300,7 @@ g_type_init_with_debug_flags (GTypeDebugFlags debug_flags)
static_quark_dependants_array = g_quark_from_static_string ("-g-type-private--dependants-array");
/* type qname hash table */
static_type_nodes_ht = g_hash_table_new (g_direct_hash, g_direct_equal);
static_type_nodes_ht = g_hash_table_new (g_str_hash, g_str_equal);
/* invalid type G_TYPE_INVALID (0)
*/