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Heap snapshot diff

Allocated 13.4 MiB → 12.9 MiB (-480.98 KiB, -3.5%) across 700,372 → 700,479 nodes and 852,764 → 790,411 edges.

Category Change Delta % Size Nodes
Array -5.9% -482.794 KiB 59.4% → 57.9% 7.94 MiB → 7.47 MiB 130,134 → 130,173
Number 0.0% 0 B 28.5% → 29.6% 3.82 MiB 501,096
Object +0.2% +1.984 KiB 9.4% → 9.8% 1.26 MiB 43,416 → 43,510
String -0.1% -182 B 2.3% → 2.4% 314 KiB 22,945 → 22,932
Object shape ~0% +8 B 0.3% 43.7 KiB 2,685 → 2,672
Big number 0.0% 0 B <0.1% 2.52 KiB 92
Regular expression 0.0% 0 B <0.1% 333 B 3
Synthetic — 0 B 0.0% 0 B 1

Largest constructors

Self size

Constructors ranked by bytes allocated for their instances, excluding nodes kept reachable by them.

Regressions

Constructors with the largest increase in self size.

Change Delta % Size Instances Constructor
+2.8% +5.308 KiB 1.4% → 1.5% 188 KiB → 193 KiB 1,929 → 1,941 int[]
new +3.687 KiB 0.0% → <0.1% 0 B → 3.69 KiB 0 → 59 org.renaissance.jdk.concurrent.JavaKMeans$AssignmentTask
+0.6% +1.64 KiB 2.0% → 2.1% 276 KiB → 278 KiB 10,093 → 10,153 java.util.HashMap$Node
+0.6% +1 KiB 1.3% 175 KiB → 176 KiB 410 → 422 java.util.HashMap$Node[]
+48.6% +864 B <0.1% 1.73 KiB → 2.58 KiB 111 → 165 java.util.ArrayList
+1.8% +336 B 0.1% 17.9 KiB → 18.2 KiB 381 → 388 java.util.HashMap
~0% +8 B 0.3% 43.7 KiB 2,685 → 2,672 java.lang.Class
Array
Change Delta % Size Instances Constructor
+2.8% +5.308 KiB 1.4% → 1.5% 188 KiB → 193 KiB 1,929 → 1,941 int[]
+0.6% +1 KiB 1.3% 175 KiB → 176 KiB 410 → 422 java.util.HashMap$Node[]
Object
Change Delta % Size Instances Constructor
new +3.687 KiB 0.0% → <0.1% 0 B → 3.69 KiB 0 → 59 org.renaissance.jdk.concurrent.JavaKMeans$AssignmentTask
+0.6% +1.64 KiB 2.0% → 2.1% 276 KiB → 278 KiB 10,093 → 10,153 java.util.HashMap$Node
+48.6% +864 B <0.1% 1.73 KiB → 2.58 KiB 111 → 165 java.util.ArrayList
+1.8% +336 B 0.1% 17.9 KiB → 18.2 KiB 381 → 388 java.util.HashMap

Improvements

Constructors with the largest decrease in self size.

Change Delta % Size Instances Constructor
-25.2% -487.273 KiB 14.1% → 10.9% 1.89 MiB → 1.41 MiB 1,915 → 1,969 java.lang.Object[]
removed -3.992 KiB <0.1% → 0.0% 3.99 KiB → 0 B 73 → 0 org.renaissance.jdk.concurrent.JavaKMeans$VectorSumTask
-64.1% -1,000 B <0.1% 1.52 KiB → 560 B 32 → 7 double[]
-0.1% -858 B 11.5% → 12.0% 1.54 MiB 23,691 → 23,678 byte[]
-88.9% -448 B <0.1% 504 B → 56 B 9 → 1 org.renaissance.jdk.concurrent.JavaKMeans$UpdateTask
-0.1% -182 B 2.3% → 2.4% 314 KiB 22,945 → 22,932 java.lang.String
-75.0% -72 B <0.1% 96 B → 24 B 4 → 1 java.util.concurrent.ForkJoinTask$Aux
removed -16 B <0.1% → 0.0% 16 B → 0 B 1 → 0 java.util.concurrent.ConcurrentHashMap$CounterCell[]
removed -16 B <0.1% → 0.0% 16 B → 0 B 2 → 0 java.util.concurrent.ConcurrentHashMap$CounterCell
Array
Change Delta % Size Instances Constructor
-25.2% -487.273 KiB 14.1% → 10.9% 1.89 MiB → 1.41 MiB 1,915 → 1,969 java.lang.Object[]
-64.1% -1,000 B <0.1% 1.52 KiB → 560 B 32 → 7 double[]
-0.1% -858 B 11.5% → 12.0% 1.54 MiB 23,691 → 23,678 byte[]
removed -16 B <0.1% → 0.0% 16 B → 0 B 1 → 0 java.util.concurrent.ConcurrentHashMap$CounterCell[]
Object
Change Delta % Size Instances Constructor
removed -3.992 KiB <0.1% → 0.0% 3.99 KiB → 0 B 73 → 0 org.renaissance.jdk.concurrent.JavaKMeans$VectorSumTask
-88.9% -448 B <0.1% 504 B → 56 B 9 → 1 org.renaissance.jdk.concurrent.JavaKMeans$UpdateTask
-75.0% -72 B <0.1% 96 B → 24 B 4 → 1 java.util.concurrent.ForkJoinTask$Aux
removed -16 B <0.1% → 0.0% 16 B → 0 B 2 → 0 java.util.concurrent.ConcurrentHashMap$CounterCell
String
Change Delta % Size Instances Constructor
-0.1% -182 B 2.3% → 2.4% 314 KiB 22,945 → 22,932 java.lang.String

Retained size

Constructors ranked by bytes allocated for their instances and all nodes that would be freed if their instances were garbage collected.

Regressions

Constructors with the largest increase in retained size.

Change Delta % Size Instances Constructor
+256.8% +4.292 MiB 12.5% → 46.2% 1.67 MiB → 5.96 MiB 111 → 165 java.util.ArrayList
+208.6% +4.291 MiB 15.4% → 49.2% 2.06 MiB → 6.35 MiB 1,915 → 1,969 java.lang.Object[]
+21.2% +297.916 KiB 10.3% → 12.9% 1.37 MiB → 1.66 MiB 381 → 388 java.util.HashMap
+21.3% +297.588 KiB 10.2% → 12.8% 1.36 MiB → 1.66 MiB 410 → 422 java.util.HashMap$Node[]
+23.6% +296.588 KiB 9.2% → 11.7% 1.23 MiB → 1.52 MiB 10,093 → 10,153 java.util.HashMap$Node
+14.9% +21.363 KiB 1.1% → 1.3% 144 KiB → 165 KiB 1,929 → 1,941 int[]
new +3.687 KiB 0.0% → <0.1% 0 B → 3.69 KiB 0 → 59 org.renaissance.jdk.concurrent.JavaKMeans$AssignmentTask
Array
Change Delta % Size Instances Constructor
+208.6% +4.291 MiB 15.4% → 49.2% 2.06 MiB → 6.35 MiB 1,915 → 1,969 java.lang.Object[]
+21.3% +297.588 KiB 10.2% → 12.8% 1.36 MiB → 1.66 MiB 410 → 422 java.util.HashMap$Node[]
+14.9% +21.363 KiB 1.1% → 1.3% 144 KiB → 165 KiB 1,929 → 1,941 int[]
Object
Change Delta % Size Instances Constructor
+256.8% +4.292 MiB 12.5% → 46.2% 1.67 MiB → 5.96 MiB 111 → 165 java.util.ArrayList
+21.2% +297.916 KiB 10.3% → 12.9% 1.37 MiB → 1.66 MiB 381 → 388 java.util.HashMap
+23.6% +296.588 KiB 9.2% → 11.7% 1.23 MiB → 1.52 MiB 10,093 → 10,153 java.util.HashMap$Node
new +3.687 KiB 0.0% → <0.1% 0 B → 3.69 KiB 0 → 59 org.renaissance.jdk.concurrent.JavaKMeans$AssignmentTask

Improvements

Constructors with the largest decrease in retained size.

Change Delta % Size Instances Constructor
removed -4.226 KiB <0.1% → 0.0% 4.23 KiB → 0 B 73 → 0 org.renaissance.jdk.concurrent.JavaKMeans$VectorSumTask
-64.1% -1,000 B <0.1% 1.52 KiB → 560 B 32 → 7 double[]
-37.0% -456 B <0.1% 1.2 KiB → 777 B 1 scala.collection.immutable.VectorBuilder
-88.9% -448 B <0.1% 504 B → 56 B 9 → 1 org.renaissance.jdk.concurrent.JavaKMeans$UpdateTask
-75.0% -72 B <0.1% 96 B → 24 B 4 → 1 java.util.concurrent.ForkJoinTask$Aux
~0% -32 B 3.9% → 4.1% 536 KiB 119 java.util.concurrent.ConcurrentHashMap
-0.1% -32 B 0.4% 55.7 KiB → 55.6 KiB 1 jdk.internal.util.ReferencedKeySet
-0.1% -32 B 0.4% 55.6 KiB 1 jdk.internal.util.ReferencedKeyMap
removed -32 B <0.1% → 0.0% 32 B → 0 B 1 → 0 java.util.concurrent.ConcurrentHashMap$CounterCell[]
~0% -24 B 7.1% → 7.3% 969 KiB 2,685 → 2,672 java.lang.Class
~0% -20 B 11.3% → 11.7% 1.51 MiB 23,691 → 23,678 byte[]
removed -16 B <0.1% → 0.0% 16 B → 0 B 2 → 0 java.util.concurrent.ConcurrentHashMap$CounterCell
~0% -15 B 6.9% → 7.2% 951 KiB 22,945 → 22,932 java.lang.String
~0% -10 B 1.0% → 1.1% 139 KiB 2 java.net.URLClassLoader
-0.2% -10 B <0.1% 6.42 KiB 3 jdk.internal.loader.URLClassPath
-0.1% -5 B <0.1% 3.61 KiB → 3.6 KiB 22 java.net.URL
-0.2% -5 B <0.1% 3.04 KiB 10 jdk.internal.loader.URLClassPath$JarLoader
-0.2% -4 B <0.1% 1.72 KiB 13 java.security.CodeSource
-0.1% -1 B <0.1% 1.49 KiB 19 sun.nio.fs.UnixPath
Array
Change Delta % Size Instances Constructor
-64.1% -1,000 B <0.1% 1.52 KiB → 560 B 32 → 7 double[]
removed -32 B <0.1% → 0.0% 32 B → 0 B 1 → 0 java.util.concurrent.ConcurrentHashMap$CounterCell[]
~0% -20 B 11.3% → 11.7% 1.51 MiB 23,691 → 23,678 byte[]
Object
Change Delta % Size Instances Constructor
removed -4.226 KiB <0.1% → 0.0% 4.23 KiB → 0 B 73 → 0 org.renaissance.jdk.concurrent.JavaKMeans$VectorSumTask
-37.0% -456 B <0.1% 1.2 KiB → 777 B 1 scala.collection.immutable.VectorBuilder
-88.9% -448 B <0.1% 504 B → 56 B 9 → 1 org.renaissance.jdk.concurrent.JavaKMeans$UpdateTask
-75.0% -72 B <0.1% 96 B → 24 B 4 → 1 java.util.concurrent.ForkJoinTask$Aux
~0% -32 B 3.9% → 4.1% 536 KiB 119 java.util.concurrent.ConcurrentHashMap
-0.1% -32 B 0.4% 55.7 KiB → 55.6 KiB 1 jdk.internal.util.ReferencedKeySet
-0.1% -32 B 0.4% 55.6 KiB 1 jdk.internal.util.ReferencedKeyMap
removed -16 B <0.1% → 0.0% 16 B → 0 B 2 → 0 java.util.concurrent.ConcurrentHashMap$CounterCell
~0% -10 B 1.0% → 1.1% 139 KiB 2 java.net.URLClassLoader
-0.2% -10 B <0.1% 6.42 KiB 3 jdk.internal.loader.URLClassPath
-0.1% -5 B <0.1% 3.61 KiB → 3.6 KiB 22 java.net.URL
-0.2% -5 B <0.1% 3.04 KiB 10 jdk.internal.loader.URLClassPath$JarLoader
-0.2% -4 B <0.1% 1.72 KiB 13 java.security.CodeSource
-0.1% -1 B <0.1% 1.49 KiB 19 sun.nio.fs.UnixPath
String
Change Delta % Size Instances Constructor
~0% -15 B 6.9% → 7.2% 951 KiB 22,945 → 22,932 java.lang.String