JMH JSON 基准测试

1 前言

阅读本文大约需要 3 分钟。

fastjson 究竟有多快？json 开源组件如何选项？为什么 SpringBoot2 json 组件选择了 jackson？

java-json-benchmark 项目 使用 JMH 对各种 Java Json 库的吞吐性能进行了基准测试。它涵盖了以下库：

序号	json 组件 (Mvnrepository 链接)	版本 (2020.03)	版本 (2021.05)	对比 (+/=)
1	jackson	2.10.2	2.12.3	+
2	genson	1.6	1.6	=
3	fastjson	1.2.62	1.2.76	+
4	gson	2.8.6	2.8.6	=
5	org.json	20090211	20210307	+
6	javax.json	1.1.4	1.1.4	=
7	json-io	4.12.0	4.12.0	=
8	flexjson	3.3	3.3	=
9	boon	0.34	0.34	=
10	json-smart	2.3	2.4.7	+
11	johnzon	1.2.3	1.2.11	+
12	logansquare	1.3.7	1.3.7	=
13	dsl-json	1.9.5	1.9.8	+
14	json-simple	1.1.1	1.1.1	=
15	nanojson	1.4	1.7	+
16	jodd-json	5.1.3	6.0.3	+
17	moshi	1.9.2	1.12.0	+
18	tapestry	5.4.5	5.7.2	+
19	jsoniter	0.9.23	0.9.23	=
20	minimal-json	0.9.5	0.9.5	=
21	mjson	1.4.1	1.4.1	=
22	underscore	1.52	1.66	+
23	yasson	1.0.6	1.0.9	+
24	javassist	3.26.0-GA	3.28.0-GA	+
25	purejson	1.0.1	1.0.1	=

1.1 TODO

New Jakarta JSON Binding 2.0.0 API with new jakarta.* namespace:

<!-- https://mvnrepository.com/artifact/org.glassfish/jakarta.json -->
<dependency>
    <groupId>org.glassfish</groupId>
    <artifactId>jakarta.json</artifactId>
    <version>2.0.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/jakarta.json/jakarta.json-api -->
<dependency>
    <groupId>jakarta.json</groupId>
    <artifactId>jakarta.json-api</artifactId>
    <version>2.0.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/jakarta.json.bind/jakarta.json.bind-api -->
<dependency>
    <groupId>jakarta.json.bind</groupId>
    <artifactId>jakarta.json.bind-api</artifactId>
    <version>2.0.0</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.eclipse/yasson -->
<dependency>
    <groupId>org.eclipse</groupId>
    <artifactId>yasson</artifactId>
    <version>2.0.2</version>
    <scope>test</scope>
</dependency>

1.2 Users 对象

用例：基本类型，字符串，列表和简单 POJO。

1.3 Clients 对象

用例: 基本类型，字符串，列表和简单 POJO，数组，枚举，UUID，LocalDate。

注意: 由于缺少对某些评估类型的支持，因此使用此模型测试的库较少。

2 Benchmark 结果 (2021.05.13)

users-deser-1

users-ser-1

clients-deser-1

clients-ser-1

Benchmark 配置

• CPU: Inter(R) Core(TM) i5-8250U CPU @1.60GHz 1.80GHz
• RAM: 8.00GB
• OS: Windows 10 2004

# JMH version: 1.29
# VM version: JDK 1.8.0_202, Java HotSpot(TM) 64-Bit Server VM, 25.202-b08
# VM invoker: C:\Program Files\Java\jre1.8.0_202\bin\java.exe
# VM options: -XX:+AggressiveOpts -Xms2g -Xmx2g
# Blackhole mode: full + dont-inline hint
# Warmup: 5 iterations, 10 s each
# Measurement: 10 iterations, 3 s each
# Timeout: 10 min per iteration
# Threads: 16 threads, will synchronize iterations
# Benchmark mode: Throughput, ops/time

3 Benchmark 结果 (2020.03.01)

用例：基本类型，字符串，列表和简单 POJO。

users-deser-1

users-ser-1

clients-deser-1

clients-ser-1

Benchmark 配置

测试是在 Amazon EC2 c5.xlarge (4 vCPU, 8 GiB RAM) 上运行的，JMH 配置:

# JMH version: 1.23
# VM version: JDK 1.8.0_242, OpenJDK 64-Bit Server VM, 25.242-b08
# VM invoker: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.242.b08-0.amzn2.0.1.x86_64/jre/bin/java
# VM options: -XX:+AggressiveOpts -Xms2g -Xmx2g
# Warmup: 5 iterations, 10 s each
# Measurement: 10 iterations, 3 s each
# Timeout: 10 min per iteration
# Threads: 16 threads, will synchronize iterations
# Benchmark mode: Throughput, ops/time

4 Links (技术栈)

1. JSON-B: JSON-B is a standard binding layer for converting Java objects to/from JSON messages. It defines a default mapping algorithm for converting existing Java classes to JSON, while enabling developers to customize the mapping process through the use of Java annotations.
2. JSON-P: JSON Processing (JSON-P) is a Java API to process (for e.g. parse, generate, transform and query) JSON messages. It produces and consumes JSON text in a streaming fashion (similar to StAX API for XML) and allows to build a Java object model for JSON text using API classes (similar to DOM API for XML).
3. Gradle Plugin shadow: Gradle plugin to create fat/uber JARs, apply file transforms, and relocate packages for applications and libraries. Gradle version of Maven's Shade.
4. Maven Plugin shade: Apache Maven Shade Plugin.
5. LoganSquare: Note that Gradle is the only supported build configuration for LoganSquare. To add the library to your app's build.gradle file.
6. Javapoet: A Java API for generating .java source files.
7. Apache ECharts: An Open Source JavaScript Visualization Library.
8. JMH: JMH is a Java harness for building, running, and analysing nano/micro/milli/macro benchmarks written in Java and other languages targetting the JVM.

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