Spring Boot 啟動(dòng)這么慢,怪我咯
來(lái)源:importnew.com/30647.html
1. FluxBaseline 2. WebMVC 3. spring-context-indexer 4. 惰性初始化 5. NoVerify 6. TieredStopAtLevel 7. 指定 SpringConfigLocation 參數(shù) 8. 關(guān)閉 JMX 9. 取消 Logback 10. 取消 Jackson 11. 取消 HibernateValidator 12. AppCDS 13. 使用 Thin Launcher 的 Flux 14. Thin Launcher + CDS 15. 所有操作都上 更進(jìn)一步
“Spring有多快?”
這是 2018 Spring One Platform 中的一場(chǎng)會(huì)議。看完會(huì)議視頻,我自己動(dòng)手試了一下。下面是我做出的測(cè)試結(jié)果。
還沒(méi)有觀(guān)看視頻的朋友推薦看一下,非常有意思。
“https://springoneplatform.io/2018/sessions/how-fast-is-spring-
本文使用的代碼
“https://github.com/bufferings/spring-boot-startup-mybench
我使用的是 OpenJDK 11。
java?--version
openjdk?11.0.1?2018-10-16
OpenJDK?Runtime?Environment?18.9?(build?11.0.1+13)
OpenJDK?64-Bit?Server?VM?18.9?(build?11.0.1+13,?mixed?mode)
可以按照下面這樣運(yùn)行基準(zhǔn)測(cè)試。運(yùn)行起來(lái)可能需要一些時(shí)間,下面會(huì)執(zhí)行所有的測(cè)試。
./mvnw?clean?package
(cd?benchmarks/;?java?-jar?target/benchmarks.jar)
1. FluxBaseline
我使用 SpringInitializr 創(chuàng)建項(xiàng)目,僅包含 Reactive Web。接下來(lái),我會(huì)寫(xiě)一個(gè) WebMVC 風(fēng)格的極簡(jiǎn)controller。
@SpringBootApplication
@RestController
public?class?DemoApplication?{
??@GetMapping("/")
??public?String?home()?{
????return?"Hello";
??}
??public?static?void?main(String[]?args)?{
????SpringApplication.run(DemoApplication.class,?args);
??}
}
Spring Boot 版本是 2.1.0.RELEASE。
????org.springframework.boot
????spring-boot-starter-parent
????2.1.0.RELEASE
???? ?
啟動(dòng)結(jié)果 2.938 ± 0.287 s/op。
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
現(xiàn)在,以這個(gè)結(jié)果作為基線(xiàn)。讓我們從這里開(kāi)始。
2. WebMVC
我很好奇為什么要用 WebMVC 而不是 WebFlux?我嘗試了一下。也許僅僅是為了比較 Tomcat 和 Netty?
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
MyBenchmark.case02_Web???????????????????????????????ss???10??3.281?±?0.342???s/op
WebFlux 快了一點(diǎn),難道不是嗎?
“推薦一個(gè)艿艿寫(xiě)的 3000+ Star 的 SpringCloud Alibaba 電商開(kāi)源項(xiàng)目的倉(cāng)庫(kù):https://github.com/YunaiV/onemall
3. spring-context-indexer
接下來(lái),我試了 spring-context-indexer,似乎創(chuàng)建了 component index。
????org.springframework
????spring-context-indexer
????true
嗯…慢了一點(diǎn)點(diǎn)?
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
MyBenchmark.case03_WithContextIndexer????????????????ss???10??3.063?±?0.102???s/op
我檢查了 spring.components,發(fā)現(xiàn)只包含了一個(gè)組件。了解…我應(yīng)該嘗試更大一點(diǎn)的項(xiàng)目,這樣才能看到效果。
#
#Sun?Nov?04?18:42:59?JST?2018
com.example.DemoApplication=org.springframework.stereotype.Component
4. 惰性初始化
嘗試了惰性初始化。
@Configuration
public?class?LazyInitBeanFactoryPostProcessor?implements?BeanFactoryPostProcessor?{
??@Override
??public?void?postProcessBeanFactory(ConfigurableListableBeanFactory?beanFactory)?throws?BeansException?{
????for?(String?beanName?:?beanFactory.getBeanDefinitionNames())?{
??????beanFactory.getBeanDefinition(beanName).setLazyInit(true);
????}
??}
}
查看結(jié)果,啟動(dòng)變快了一點(diǎn)。
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
MyBenchmark.case04_WithLazyInit??????????????????????ss???10??2.844?±?0.129???s/op
5. NoVerify
運(yùn)行加 -noverify 選項(xiàng):
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
MyBenchmark.case05_WithNoVerifyOption????????????????ss???10??2.582?±?0.060???s/op
啟動(dòng)變得快了一點(diǎn)。不知道為什么有這個(gè)結(jié)果,稍后需要仔細(xì)了解一下。
6. TieredStopAtLevel
運(yùn)行加 -XX:TieredStopAtLevel=1 選項(xiàng):
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
MyBenchmark.case06_WithTieredStopAtLevel1Option??????ss???10??1.980?±?0.037???s/op
嗯,快多了!減少了幾乎2秒。還是不知道這個(gè)參數(shù)有什么含義,稍后需要仔細(xì)了解一下。
7. 指定 SpringConfigLocation 參數(shù)
運(yùn)行加 -Dspring.config.location=classpath:/application.properties 選項(xiàng):
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
MyBenchmark.case07_WithSpringConfigLocationOption????ss???10??3.026?±?0.139???s/op
嗯,又變慢了。
8. 關(guān)閉 JMX
運(yùn)行加 -Dspring.jmx.enabled=false 選項(xiàng):
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
MyBenchmark.case08_WithJmxDisabledOption?????????????ss???10??2.877?±?0.097???s/op
變得快了一點(diǎn)。
9. 取消 Logback
從這里開(kāi)始,我開(kāi)始減少函數(shù)庫(kù)。開(kāi)始,取消 Logback:
????org.springframework.boot
????spring-boot-starter-webflux
????
????????
????????????spring-boot-starter-logging
????????????org.springframework.boot
????????
????
????org.slf4j
????slf4j-jdk14
結(jié)果如下:
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
MyBenchmark.case09_WithoutLogback????????????????????ss???10??2.904?±?0.096???s/op
嗯…似乎有一點(diǎn)點(diǎn)改進(jìn)?
10. 取消 Jackson
接下來(lái)是 Jackson
????org.springframework.boot
????spring-boot-starter-webflux
????
????????
????????????spring-boot-starter-json
????????????org.springframework.boot
????????
????
結(jié)果如下:
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
MyBenchmark.case10_WithoutJackson????????????????????ss???10??2.789?±?0.093???s/op
結(jié)果變快了一點(diǎn)。
11. 取消 HibernateValidator
????org.springframework.boot
????spring-boot-starter-webflux
????
????????
????????????hibernate-validator
????????????org.hibernate.validator
????????
????
結(jié)果如下:
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
MyBenchmark.case11_WithoutHibernateValidator?????????ss???10??2.857?±?0.084???s/op
也有一點(diǎn)效果。
到這里為止,不再取消函數(shù)庫(kù)了。
12. AppCDS
AppCDS (Application Class Data Sharing) 是 Oracle JDK 的一個(gè)企業(yè)版功能。OpenJDK 10 開(kāi)始包含了這個(gè)功能。
看起來(lái) AppCDS 轉(zhuǎn)儲(chǔ)信息存到了一個(gè)共享壓縮文件,所以啟動(dòng)時(shí)間變短了。
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
MyBenchmark.case12_WithAppCds????????????????????????ss???10??2.957?±?0.079???s/op
嗯…并沒(méi)有變快…然后我閱讀了CDS的相關(guān)文章,找到原因了。
SpringBoot FatJAR 不在 CDS 管理范圍內(nèi)。
13. 使用 Thin Launcher 的 Flux
嗯,對(duì)不起,“Exploded” 基準(zhǔn)測(cè)試錯(cuò)了。我曾經(jīng)試著使用 FatJAR,但是 CDS 不能這么干。所以,我轉(zhuǎn)而使用 Thin Launcher,所以 “Exploded” 就變成了 “Thin Launche”。
使用 CDS 以前,我會(huì)測(cè)試使用 Thin Launcher 打包 JAR 文件的啟動(dòng)速度。
????
????????org.springframework.boot
????????spring-boot-maven-plugin
????????
????????????
????????????????org.springframework.boot.experimental
????????????????spring-boot-thin-layout
????????????????1.0.15.RELEASE
????????????
????????
????
盡管我使用 Thin Launcher 打包 app,但并沒(méi)有使用 Thin Launcher 啟動(dòng)類(lèi),而是使用 Main class 讓啟動(dòng)盡可能快一些。
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
MyBenchmark.case13_Exploded??????????????????????????ss???10??2.476?±?0.091???s/op
嗯,快了一點(diǎn),對(duì)嗎?
14. Thin Launcher + CDS
現(xiàn)在,我要使用 AppCDS 。
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
MyBenchmark.case14_ExplodedWithAppCds????????????????ss???10??1.535?±?0.036???s/op
喔!變得更快了!
15. 所有操作都上
最終,我把所有操作都用上。
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
MyBenchmark.case15_AllApplied????????????????????????ss???10??0.801?±?0.037???s/op
小于1秒鐘!(∩′?`)∩耶
更進(jìn)一步
在 Dave 的視頻中,他提到了“函數(shù)式 Bean 定義”,嘗試僅使用 Spring 不用 SpringBoot,app變得更快了。其中的道理還需要進(jìn)一步了解。
結(jié)果:
Benchmark??????????????????????????????????????????Mode??Cnt??Score???Error??Units
MyBenchmark.case01_FluxBaseline??????????????????????ss???10??2.938?±?0.287???s/op
MyBenchmark.case02_Web???????????????????????????????ss???10??3.281?±?0.342???s/op
MyBenchmark.case03_WithContextIndexer????????????????ss???10??3.063?±?0.102???s/op
MyBenchmark.case04_WithLazyInit??????????????????????ss???10??2.844?±?0.129???s/op
MyBenchmark.case05_WithNoVerifyOption????????????????ss???10??2.582?±?0.060???s/op
MyBenchmark.case06_WithTieredStopAtLevel1Option??????ss???10??1.980?±?0.037???s/op
MyBenchmark.case07_WithSpringConfigLocationOption????ss???10??3.026?±?0.139???s/op
MyBenchmark.case08_WithJmxDisabledOption?????????????ss???10??2.877?±?0.097???s/op
MyBenchmark.case09_WithoutLogback????????????????????ss???10??2.904?±?0.096???s/op
MyBenchmark.case10_WithoutJackson????????????????????ss???10??2.789?±?0.093???s/op
MyBenchmark.case11_WithoutHibernateValidator?????????ss???10??2.857?±?0.084???s/op
MyBenchmark.case12_WithAppCds????????????????????????ss???10??2.957?±?0.079???s/op
MyBenchmark.case13_Exploded??????????????????????????ss???10??2.476?±?0.091???s/op
MyBenchmark.case14_ExplodedWithAppCds????????????????ss???10??1.535?±?0.036???s/op
MyBenchmark.case15_AllApplied????????????????????????ss???10??0.801?±?0.037???s/op
真的很有意思。感謝!
往期推薦
后臺(tái)回復(fù)?學(xué)習(xí)資料?領(lǐng)取學(xué)習(xí)視頻
如有收獲,點(diǎn)個(gè)在看,誠(chéng)摯感謝
