Java Vector API 10th incubation in Java 25 LTS

[obriensystems]

ObrienlabsDev/blog#132

p1gen6
Vector width: 256 Time: 8135 ms
13900ks d 5.89ghz
Vector width: 256 Time: 6125 ms
m1max macbook pro
Vector width: 128 Time: 9721 ms

20260207

[obriensystems]

see

module-info.java at the root of src/main/java
module my.project {
    // Enable access to the Vector API
    requires jdk.incubator.vector;
}

import jdk.incubator.vector.*;

/**
 * https://github.com/ObrienlabsDev/performance/issues/42
 */
public class VectorCli {
	
	static final VectorSpecies<Float> SPECIES = FloatVector.SPECIES_PREFERRED;

    public static void main( String[] args) {
        VectorCli vectorCli = new VectorCli();
}


michaelobrien@mbp8 classes % java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli
WARNING: Using incubator modules: jdk.incubator.vector

[obriensystems]

update: we still get warmup or which random core assigned issues - writing forkjoin to take this out of the equation.

Run with e-cores off, no Hyper Threading (was on e-cores only though) - keep only p cores so we do not have RAM contention

 michael@13900b MINGW64 /c/wse_github/obrienlabsdev/performance/cpu/virtual/vector/java-vector-api-cli/target/classes (main)

$ java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli
WARNING: Using incubator modules: jdk.incubator.vector
Vector width: 256 Time: 13657 ms
(base)
michael@13900b MINGW64 /c/wse_github/obrienlabsdev/performance/cpu/virtual/vector/java-vector-api-cli/target/classes (main)
$ java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli
WARNING: Using incubator modules: jdk.incubator.vector
Vector width: 256 Time: 14588 ms

(base)
michael@13900b MINGW64 /c/wse_github/obrienlabsdev/performance/cpu/virtual/vector/java-vector-api-cli/target/classes (main)
$ java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli
WARNING: Using incubator modules: jdk.incubator.vector
Vector width: 256 Time: 8569 ms
(base)
michael@13900b MINGW64 /c/wse_github/obrienlabsdev/performance/cpu/virtual/vector/java-vector-api-cli/target/classes (main)
$ java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli
WARNING: Using incubator modules: jdk.incubator.vector
Vector width: 256 Time: 6998 ms

after turning off 8 e cores and e-core ht - remaining 8 p cores only

michael@13900b MINGW64 /c/wse_github/obrienlabsdev/performance/cpu/virtual/vector/java-vector-api-cli/target/classes (main)
$ java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli
WARNING: Using incubator modules: jdk.incubator.vector
Vector width: 256 Time: 7959 ms
(base)
michael@13900b MINGW64 /c/wse_github/obrienlabsdev/performance/cpu/virtual/vector/java-vector-api-cli/target/classes (main)
$ java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli
WARNING: Using incubator modules: jdk.incubator.vector
Vector width: 256 Time: 8183 ms
(base)
michael@13900b MINGW64 /c/wse_github/obrienlabsdev/performance/cpu/virtual/vector/java-vector-api-cli/target/classes (main)
$ java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli
WARNING: Using incubator modules: jdk.incubator.vector
Vector width: 256 Time: 7613 ms
(base)
michael@13900b MINGW64 /c/wse_github/obrienlabsdev/performance/cpu/virtual/vector/java-vector-api-cli/target/classes (main)
$ java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli
WARNING: Using incubator modules: jdk.incubator.vector
Vector width: 256 Time: 7782 ms

14900k with RTX-A6000

michael@14900c MINGW64 /c/wse_github/obrienlabsdev/performance/cpu/virtual/vector/java-vector-api-cli/target/classes (main)
$ java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli
WARNING: Using incubator modules: jdk.incubator.vector
Vector width: 256 Time: 9130 ms

michael@14900c MINGW64 /c/wse_github/obrienlabsdev/performance/cpu/virtual/vector/java-vector-api-cli/target/classes (main)
$ java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli
WARNING: Using incubator modules: jdk.incubator.vector
Vector width: 256 Time: 10923 ms

michael@14900c MINGW64 /c/wse_github/obrienlabsdev/performance/cpu/virtual/vector/java-vector-api-cli/target/classes (main)
$ java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli
WARNING: Using incubator modules: jdk.incubator.vector
Vector width: 256 Time: 9360 ms

michael@14900c MINGW64 /c/wse_github/obrienlabsdev/performance/cpu/virtual/vector/java-vector-api-cli/target/classes (main)
$ java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli
WARNING: Using incubator modules: jdk.incubator.vector
Vector width: 256 Time: 9700 ms

michael@14900c MINGW64 /c/wse_github/obrienlabsdev/performance/cpu/virtual/vector/java-vector-api-cli/target/classes (main)
$ java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli
WARNING: Using incubator modules: jdk.incubator.vector
Vector width: 256 Time: 9897 ms

mini09 M4 only

n@mini09 java-vector-api-cli % cd target/classes 
en@mini09 classes % java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli 
WARNING: Using incubator modules: jdk.incubator.vector
Vector width: 128 Time: 7738 ms

mini10 M4 Pro

n@mini10 classes % java --add-modules jdk.incubator.vector -cp . dev.obrienlabs.vector.java_vector_api_cli.VectorCli
WARNING: Using incubator modules: jdk.incubator.vector
Vector width: 128 Time: 8489 ms