russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
88 lines
3.1 KiB
Java
88 lines
3.1 KiB
Java
/*
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* Copyright (c) 2022, 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.openjdk.bench.jdk.classfile;
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import java.lang.classfile.ClassModel;
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import java.lang.classfile.ClassFile;
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import java.lang.classfile.ClassFileElement;
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import java.lang.classfile.CodeModel;
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import java.lang.classfile.CompoundElement;
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import java.lang.classfile.MethodModel;
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import java.lang.classfile.instruction.LoadInstruction;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.BenchmarkMode;
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import org.openjdk.jmh.annotations.Mode;
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import org.openjdk.jmh.infra.Blackhole;
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/**
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* ReadCode
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*/
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public class ReadDeep extends AbstractCorpusBenchmark {
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@Benchmark
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@BenchmarkMode(Mode.Throughput)
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public void jdkElementsCountLoads(Blackhole bh) {
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var cc = ClassFile.of();
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for (byte[] bytes : classes) {
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int[] count = new int[1];
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ClassModel cm = cc.parse(bytes);
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cm.forEach(ce -> {
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if (ce instanceof MethodModel mm) {
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mm.forEach(me -> {
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if (me instanceof CodeModel xm) {
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xm.forEach(xe -> {
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if (xe instanceof LoadInstruction) {
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++count[0];
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}
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});
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}
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});
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};
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});
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bh.consume(count[0]);
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}
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}
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@Benchmark
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@BenchmarkMode(Mode.Throughput)
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public void jdkElementsDeepIterate(Blackhole bh) {
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var cc = ClassFile.of();
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for (byte[] bytes : classes) {
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ClassModel cm = cc.parse(bytes);
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bh.consume(iterateAll(cm));
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}
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}
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private static ClassFileElement iterateAll(CompoundElement<?> model) {
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ClassFileElement last = null;
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for (var e : model) {
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if (e instanceof CompoundElement<?> cm) {
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last = iterateAll(cm);
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} else {
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last = e;
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}
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}
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return last; // provide some kind of result that the benchmark can feed to the black hole
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}
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}
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