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Opened 4 years ago

Closed 3 years ago

#22030 closed defect (wontfix)

[PATCH] Replace Utils.isStripEmpty with Utils.isBlank in AbstractPrimitive#put

Reported by: taylor.smock Owned by: team
Priority: normal Milestone: 22.07
Component: Core Version:
Keywords: performance Cc:

Description (last modified by taylor.smock)

I've been doing some profiling with Vector tiles, and I've noticed that isStripEmpty makes a significant number of allocations.

Looking at the profiler output, it looks like Utils.isBlank effectively gets optimized away (tested on Java 8/17). Does anyone know of a reason to keep Utils.isStripEmpty?

  • src/org/openstreetmap/josm/data/osm/AbstractPrimitive.java 

    diff --git a/src/org/openstreetmap/josm/data/osm/AbstractPrimitive.java b/src/org/openstreetmap/josm/data/osm/AbstractPrimitive.java
index b4b1e1e339..92b1572a11 100644
    a b public abstract class AbstractPrimitive implements IPrimitive, IFilterablePrimit  
    584584    @Override
    585585    public void put(String key, String value) {
    586586        Map<String, String> originalKeys = getKeys();
    587         if (key == null || Utils.isStripEmpty(key))
     587        if (key == null || Utils.isBlank(key))
    588588            return;
    589589        else if (value == null) {
    590590            remove(key);

Utils#isStripEmpty (Java 8)
Utils#isStripEmpty, Java 8

Allocations:

  • Utils#isStripEmpty: 112 MB
  • Arrays#copyOf: 57 MB
  • AbstractPrimitive#getKeys: 25 MB
  • String[]: 4 MB

Utils#isBlank (Java 8)
Utils#isBlank, Java 8

Allocations:

  • Arrays#copyOf: 61 MB
  • AbstractPrimitive#getKeys: 3.5 MB
  • String[]: 2.3 MB

Utils#isBlank (Java 17)
Utils#isBlank, Java 17

Allocations:

  • Arrays#copyOf: 21 MB
  • AbstractPrimitive#getKeys: 43 MB
  • String[]: 12 MB

There is a bit of jitter, but the primary cost of AbstractPrimitive#put is from Utils#isStripEmpty.

Attachments (3)

flamegraph_isStripEmpty.png​ (76.3 KB ) - added by taylor.smock 4 years ago.
Utils#isStripEmpty (Java 8)
flamegraph_isBlank_Java17.png​ (86.1 KB ) - added by taylor.smock 4 years ago.
Utils#isBlank (Java 17)
flamegraph_isBlank_Java8.png​ (79.7 KB ) - added by taylor.smock 4 years ago.
Utils#isBlank (Java 8)

Download all attachments as: .zip

Change History (8)

by taylor.smock, 4 years ago

Attachment: flamegraph_isStripEmpty.png​ added

Utils#isStripEmpty (Java 8)

by taylor.smock, 4 years ago

Attachment: flamegraph_isBlank_Java17.png​ added

Utils#isBlank (Java 17)

by taylor.smock, 4 years ago

Attachment: flamegraph_isBlank_Java8.png​ added

Utils#isBlank (Java 8)

comment:1 by taylor.smock, 4 years ago

Description: modified (diff)

comment:2 by taylor.smock, 4 years ago

Description: modified (diff)

comment:3 by taylor.smock, 4 years ago

Milestone: → 22.06
Summary: [PATCH][RFC] Replace Utils.isStripEmpty with Utils.isBlank in AbstractPrimitive#put → [PATCH] Replace Utils.isStripEmpty with Utils.isBlank in AbstractPrimitive#put

comment:4 by stoecker, 3 years ago

Milestone: 22.06 → 22.07

comment:5 by taylor.smock, 3 years ago

Resolution: → wontfix
Status: new → closed

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