Changes between Version 3 and Version 4 of rfc39_ogr_layer_algebra

Timestamp:

May 2, 2012, 1:27:39 AM (12 years ago)

Author:

Ari Jolma

Comment:

--

rfc39_ogr_layer_algebra

@@ -59 +59 @@
 == Comments on performance ==
 
-Profiling Intersection of a layer of 46288 line string features with a layer of one polygon feature (~1/3 of features within and many only partly within the one feature) showed that when the method layer was a Shapefile, most of the time was spent in reading the feature from the Shapefile. When the method layer was copied into memory, most of the time (83 %) was spent in computing the envelope of the input layer line strings.
+Profiling Intersection of a layer of 46288 line string features with a layer of one polygon feature (~1/3 of features within and many only partly within the one feature) showed that when the method layer was a Shapefile, most of the time was spent in reading the feature from the Shapefile. When the method layer was copied into memory, most of the time (83 %) was spent in OGRLineString::getEnvelope.