[tracker/wip/carlosg/perf-improvements: 4/5] libtracker-data: Avoid unescaping unichar characters if unneeded

[Carlos Garnacho <carlosg src gnome org>]

commit f5c7cc660c309856bea10b232b3c96d981d2e90e
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Jun 4 16:59:16 2020 +0200

    libtracker-data: Avoid unescaping unichar characters if unneeded
    
    Looking for unicode characters to unescape turns out a bit expensive on
    multi-megabyte updates. Have a faster path for straight query copies if
    there's no escaping sequence to be seen.
    
    This turned out to be a fair chunk of time spent on tracker-miner-fs
    first index.
    
    5.39%     5.34%  pool-tracker-mi  libtracker-data.so                 [.] tracker_unescape_unichars
    
    Now almost gone as unicode escaping characters are actually not that
    much likely to happen often.

 src/libtracker-data/tracker-sparql.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/src/libtracker-data/tracker-sparql.c b/src/libtracker-data/tracker-sparql.c
index 9b023a129..63abf8055 100644
--- a/src/libtracker-data/tracker-sparql.c
+++ b/src/libtracker-data/tracker-sparql.c
@@ -8808,7 +8808,10 @@ tracker_sparql_new (TrackerDataManager *manager,
 
        sparql = g_object_new (TRACKER_TYPE_SPARQL, NULL);
        sparql->data_manager = g_object_ref (manager);
-       sparql->sparql = tracker_unescape_unichars (query, -1);
+       if (strcasestr (query, "\\u"))
+               sparql->sparql = tracker_unescape_unichars (query, -1);
+       else
+               sparql->sparql = g_strdup (query);
 
        tree = tracker_sparql_parse_query (sparql->sparql, -1, NULL,
                                           &sparql->parser_error);
@@ -8989,7 +8992,10 @@ tracker_sparql_new_update (TrackerDataManager *manager,
 
        sparql = g_object_new (TRACKER_TYPE_SPARQL, NULL);
        sparql->data_manager = g_object_ref (manager);
-       sparql->sparql = tracker_unescape_unichars (query, -1);
+       if (strcasestr (query, "\\u"))
+               sparql->sparql = tracker_unescape_unichars (query, -1);
+       else
+               sparql->sparql = g_strdup (query);
 
        tree = tracker_sparql_parse_update (sparql->sparql, -1, &len,
                                            &sparql->parser_error);