[tracker/wip/carlosg/update-perf: 20/43] core: Add direct getters for nrl:added/modified properties

[Carlos Garnacho <carlosg src gnome org>]

commit e8883e9460135e5f779d5a5a8b5b303aeae75dd4
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Aug 15 21:08:13 2022 +0200

    core: Add direct getters for nrl:added/modified properties
    
    Since those are very frequently used properties, it makes sense to have
    a fast path lookup like we have for rdf:type, so that we don't have to
    perform a hashtable lookup every time these properties are used.

 src/libtracker-sparql/core/tracker-data-update.c | 11 +++-----
 src/libtracker-sparql/core/tracker-ontologies.c  | 34 +++++++++++++++++++++---
 src/libtracker-sparql/core/tracker-ontologies.h  |  2 ++
 3 files changed, 36 insertions(+), 11 deletions(-)
---
diff --git a/src/libtracker-sparql/core/tracker-data-update.c 
b/src/libtracker-sparql/core/tracker-data-update.c
index a42f7e56d..9e8703203 100644
--- a/src/libtracker-sparql/core/tracker-data-update.c
+++ b/src/libtracker-sparql/core/tracker-data-update.c
@@ -462,7 +462,7 @@ tracker_data_update_initialize_modseq (TrackerData  *data,
 
        temp_iface = tracker_data_manager_get_writable_db_interface (data->manager);
        ontologies = tracker_data_manager_get_ontologies (data->manager);
-       property = tracker_ontologies_get_property_by_uri (ontologies, TRACKER_PREFIX_NRL "modified");
+       property = tracker_ontologies_get_nrl_modified (ontologies);
 
        stmt = tracker_db_interface_create_vstatement (temp_iface, TRACKER_DB_STATEMENT_CACHE_TYPE_SELECT, 
&inner_error,
                                                       "SELECT MAX(object) FROM tracker_triples "
@@ -1443,8 +1443,7 @@ cache_create_service_decomposed (TrackerData   *data,
 
                data->resource_buffer->modified = TRUE;
                ontologies = tracker_data_manager_get_ontologies (data->manager);
-               modified = tracker_ontologies_get_property_by_uri (ontologies,
-                                                                  TRACKER_PREFIX_NRL "modified");
+               modified = tracker_ontologies_get_nrl_modified (ontologies);
 
                g_value_init (&gvalue, G_TYPE_INT64);
                g_value_set_int64 (&gvalue, get_transaction_modseq (data));
@@ -1461,8 +1460,7 @@ cache_create_service_decomposed (TrackerData   *data,
                GValue gvalue = { 0 };
 
                ontologies = tracker_data_manager_get_ontologies (data->manager);
-               added = tracker_ontologies_get_property_by_uri (ontologies,
-                                                               TRACKER_PREFIX_NRL "added");
+               added = tracker_ontologies_get_nrl_added (ontologies);
 
                g_value_init (&gvalue, G_TYPE_INT64);
                g_value_set_int64 (&gvalue, data->resource_time);
@@ -1962,8 +1960,7 @@ cache_insert_metadata_decomposed (TrackerData      *data,
 
                        data->resource_buffer->modified = TRUE;
                        ontologies = tracker_data_manager_get_ontologies (data->manager);
-                       modified = tracker_ontologies_get_property_by_uri (ontologies,
-                                                                          TRACKER_PREFIX_NRL "modified");
+                       modified = tracker_ontologies_get_nrl_modified (ontologies);
 
                        g_value_init (&gvalue, G_TYPE_INT64);
                        g_value_set_int64 (&gvalue, get_transaction_modseq (data));
diff --git a/src/libtracker-sparql/core/tracker-ontologies.c b/src/libtracker-sparql/core/tracker-ontologies.c
index ef0f8306d..c9b3b4906 100644
--- a/src/libtracker-sparql/core/tracker-ontologies.c
+++ b/src/libtracker-sparql/core/tracker-ontologies.c
@@ -65,8 +65,10 @@ struct _TrackerOntologiesPrivate {
        /* Hash (int id, const gchar *uri) */
        GHashTable *id_uri_pairs;
 
-       /* rdf:type */
+       /* Some fast paths for frequent properties */
        TrackerProperty *rdf_type;
+       TrackerProperty *nrl_added;
+       TrackerProperty *nrl_modified;
 
        GvdbTable *gvdb_table;
        GvdbTable *gvdb_namespaces_table;
@@ -134,9 +136,9 @@ tracker_ontologies_finalize (GObject *object)
        g_ptr_array_free (priv->properties, TRUE);
        g_hash_table_unref (priv->property_uris);
 
-       if (priv->rdf_type) {
-               g_object_unref (priv->rdf_type);
-       }
+       g_clear_object (&priv->rdf_type);
+       g_clear_object (&priv->nrl_added);
+       g_clear_object (&priv->nrl_modified);
 
        if (priv->gvdb_table) {
                gvdb_table_unref (priv->gvdb_properties_table);
@@ -172,6 +174,26 @@ tracker_ontologies_get_rdf_type (TrackerOntologies *ontologies)
        return priv->rdf_type;
 }
 
+TrackerProperty *
+tracker_ontologies_get_nrl_added (TrackerOntologies *ontologies)
+{
+       TrackerOntologiesPrivate *priv = tracker_ontologies_get_instance_private (ontologies);
+
+       g_return_val_if_fail (priv->nrl_added != NULL, NULL);
+
+       return priv->nrl_added;
+}
+
+TrackerProperty *
+tracker_ontologies_get_nrl_modified (TrackerOntologies *ontologies)
+{
+       TrackerOntologiesPrivate *priv = tracker_ontologies_get_instance_private (ontologies);
+
+       g_return_val_if_fail (priv->nrl_modified != NULL, NULL);
+
+       return priv->nrl_modified;
+}
+
 const gchar*
 tracker_ontologies_get_uri_by_id (TrackerOntologies *ontologies,
                                   TrackerRowid       id)
@@ -350,6 +372,10 @@ tracker_ontologies_add_property (TrackerOntologies *ontologies,
 
        if (g_strcmp0 (uri, TRACKER_PREFIX_RDF "type") == 0) {
                g_set_object (&priv->rdf_type, field);
+       } else if (g_strcmp0 (uri, TRACKER_PREFIX_NRL "added") == 0) {
+               g_set_object (&priv->nrl_added, field);
+       } else if (g_strcmp0 (uri, TRACKER_PREFIX_NRL "modified") == 0) {
+               g_set_object (&priv->nrl_modified, field);
        }
 
        g_ptr_array_add (priv->properties, g_object_ref (field));
diff --git a/src/libtracker-sparql/core/tracker-ontologies.h b/src/libtracker-sparql/core/tracker-ontologies.h
index 6abcd5830..a92b7e289 100644
--- a/src/libtracker-sparql/core/tracker-ontologies.h
+++ b/src/libtracker-sparql/core/tracker-ontologies.h
@@ -64,6 +64,8 @@ TrackerClass  **   tracker_ontologies_get_classes          (TrackerOntologies *o
 TrackerProperty ** tracker_ontologies_get_properties       (TrackerOntologies *ontologies,
                                                             guint             *length);
 TrackerProperty *  tracker_ontologies_get_rdf_type         (TrackerOntologies *ontologies);
+TrackerProperty *  tracker_ontologies_get_nrl_added        (TrackerOntologies *ontologies);
+TrackerProperty *  tracker_ontologies_get_nrl_modified     (TrackerOntologies *ontologies);
 
 /* Field mechanics */
 void               tracker_ontologies_add_property         (TrackerOntologies *ontologies,