[gdal] Enable multi-threaded whenever possible

(benefits including faster overviews building, warping, and more)
qgis · Feb 21, 2021 · b306ae0 · b306ae0
1 parent eb6bac2
commit b306ae0
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/src/core/qgsapplication.cpp b/src/core/qgsapplication.cpp
@@ -347,6 +347,13 @@ void QgsApplication::init( QString profileFolder )
   }
   *sSystemEnvVars() = systemEnvVarMap;
 
+#if GDAL_VERSION_NUM >= GDAL_COMPUTE_VERSION(3,2,0)
+  if ( CPLGetConfigOption( "GDAL_NUM_THREADS", nullptr ) == nullptr )
+  {
+    CPLSetConfigOption( "GDAL_NUM_THREADS", "ALL_CPUS" );
+  }
+#endif
+
 #if PROJ_VERSION_MAJOR>=6
   // append local user-writable folder as a proj search path
   QStringList currentProjSearchPaths = QgsProjUtils::searchPaths();