GsonBooster是一个注解处理器，能够在编译期自动生成兼容Kotlin特性的、高性能TypeAdapter，以提升Gson的序列化与反序列化时间性能。
Gradle
plugins {
id 'kotlin-kapt'
}
dependencies {
implementation("com.spirytusz:booster-annotation:$last_versoin")
kapt("com.spirytusz:booster-processor:$last_version")
}
kapt {
arguments {
// 指定生成TypeAdapterFactory的全限定名，不指定则不生成
arg("factory", "com.spirytusz.booster.BoosterTypeAdapterFactory")
}
}Kotlin-DSL
plugins {
kotlin("kapt")
}
dependencies {
implementation("com.spirytusz:booster-annotation:$last_versoin")
kapt("com.spirytusz:booster-processor:$last_version")
}
kapt {
arguments {
// 指定生成TypeAdapterFactory的全限定名，不指定则不生成
arg("factory", "com.spirytusz.booster.BoosterTypeAdapterFactory")
}
}// 增加注解
@Boost
data class Foo(
val string: String = ""
)
// 生成的TypeAdapterFactory注册到gson实例中
val gson = GsonBuilder()
.registerTypeAdapterFactory(BoosterTypeAdapterFactory())
.create()- OS: Android 10
- CPU: Snapdragon 855
- Core: 4
经过预热的场景下，可以看到耗时从毫秒级降低到了微秒级(横坐标为实验次数，纵坐标为耗时，单位微秒(us)):
可以从火焰图中看到反射部分（ReflectiveTypeAdapterFactory.create）被优化掉，耗时大幅缩短。
KSP(Kotlin Symbol Processing)是Google推出的更高性能、源码级的注解处理器，GsonBooster也对KSP作了支持。
Gradle
根目录build.gradle
plugins {
id('com.google.devtools.ksp') version "$kotlin_version-1.0.0"
}app模块build.gradle
plugins {
id('com.google.devtools.ksp')
}
android {
// KSP生成的代码不能被IDE自动识别到，需要手动添加到sourceSets中
buildTypes {
debug {
sourceSets.main {
java.srcDir("build/generated/ksp/debug/kotlin")
}
}
release {
sourceSets.main {
java.srcDir("build/generated/ksp/release/kotlin")
}
}
}
}
dependencies {
implementation('com.spirytusz:booster-annotation:$last_versoin')
ksp('com.spirytusz:booster-processor-ksp:$last_version')
}
ksp {
// 指定生成TypeAdapterFactory的全限定名，不指定则不生成
arg('factory', 'com.spirytusz.booster.ksp.BoosterTypeAdapterFactory')
}Kotlin DSL
根目录下的build.gradle
plugins {
kotlin("jvm")
id("com.google.devtools.ksp") version "$kotlin_version-1.0.0"
}app模块build.gradle
plugins {
id("com.google.devtools.ksp")
}
android {
// KSP生成的代码不能被IDE自动识别到，需要手动添加到sourceSets中
buildTypes {
getByName("debug") {
sourceSets.getByName("main") {
java.srcDir("build/generated/ksp/debug/kotlin")
}
}
getByName("release") {
sourceSets.getByName("main") {
java.srcDir("build/generated/ksp/release/kotlin")
}
}
}
}
dependencies {
implementation("com.spirytusz:booster-annotation:$last_versoin")
ksp("com.spirytusz:booster-processor-ksp:$last_version")
}
ksp {
// 指定生成TypeAdapterFactory的全限定名，不指定则不生成
arg("factory", "com.spirytusz.booster.ksp.BoosterTypeAdapterFactory")
}MIT License
Copyright (c) 2021 ZSpirytus
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SOFTWARE.