Changeset 18691 in josm for trunk/test/performance

Timestamp:

2023-03-14T14:37:10+01:00 (2 years ago)

Author:

taylor.smock

Message:

Significantly reduce cost of large presets like Name Suggestion Index

This reduces the startup CPU of TaggingPresets#initialize by ~29% and the memory
by ~55%. This was done by adding a batch addActiveLayerChangeListeners method
in MainLayerManager.

This additionally reduces the cost of
TaggingPresetSelect$PresetClassification.simplifyString (used by the preset
search dialog) by ~28% CPU cycles and ~58% memory allocations. This was done by
having a single static Pattern which was reused -- most of the remaining
potentially reducible cost for simplifyString is from Matcher initialization.
This would require thread local variables, so may not be worthwhile for now.

File:

• trunk/test/performance/org/openstreetmap/josm/io/OsmReaderPerformanceTest.java (modified) (1 diff)

trunk/test/performance/org/openstreetmap/josm/io/OsmReaderPerformanceTest.java

@@ -7 +7 @@
 import java.io.ByteArrayOutputStream;
 import java.io.File;
-import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;