Spring Test Profiler Report

Understanding when and how many Spring ApplicationContexts are created in your test suite allows you to optimize build times by leveraging Spring TestContext's context caching feature, which reuses already started contexts.

Generated at: 2026-07-23 14:17:30

▶ Understanding Spring TestContext Context Caching

Click to learn about Spring TestContext context caching principles and optimization tips

Spring Test Framework provides context caching to improve test performance by reusing ApplicationContext instances across multiple test classes when they share the same configuration.

Every Spring test needs an ApplicationContext - and starting one from scratch is expensive. Spring X-rays the test setup and collects every customization point that shapes the context. The result is a MergedContextConfiguration - its hashCode becomes the cache key. Same key already in the cache? The existing context is reused instantly. One tiny difference creates a new key - and a slow, brand-new context. Spring Test Profiler shows you how many contexts your suite creates - and why.

How Context Caching Works

Spring generates a cache key based on:

Context Loader - The class responsible for loading the context
Locations & Classes - Configuration files/classes specified in @ContextConfiguration
Active Profiles - Profiles activated via @ActiveProfiles
Property Sources - Test property sources from @TestPropertySource
Context Initializers - Custom context initializers
Context Customizers - Customizers from test slices like @WebMvcTest

🎯 Cache Hit

When a test class has the same exact configuration as a previous test, Spring reuses the existing ApplicationContext. This results in faster test execution.

🔄 Cache Miss

When a test class has a different configuration, Spring creates a new ApplicationContext. This takes more time but ensures test isolation.

Optimization Tips

Group similar tests: Use the same @ContextConfiguration across related test classes
Minimize @DirtiesContext: Avoid marking contexts as dirty unless absolutely necessary
Use test slices: @WebMvcTest, @DataJpaTest create focused, cacheable contexts
Consolidate profiles: Use consistent @ActiveProfiles across test classes

📚 Learn More

For detailed information about Spring Test context caching:

Test Execution Summary

Executed via: maven

Execution Time: 2026-07-23 14:17:30

Time Zone: Europe/Berlin

Cache Size ⓘ

Cache Hits ⓘ

Cache Misses ⓘ

Cache Hit Rate ⓘ

56.2%

Total Runtime ⓘ

29.0s

Test Classes ⓘ

Potential Time Savings ⓘ

21.1s

Context Load Time ⓘ

28.0s

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Spring Context Caching Statistics

Cache Size: 6 / 32

Cache Hits: 9

Cache Misses: 7

Cache Hit Rate: 56.2%

🔍 Find Context by Test Class

Start typing to search for test classes. Results will appear after entering 3 or more characters.

Context Cache Entries

Sort by:

Context ID: context-0 SpringBootTest 370 beans

Load Time: 5332ms

Heap Memory: 80.0MB

Test Classes: digital.pragmatech.demo.GoodIT

Context ID: context-1 SpringBootTest 376 beans

Load Time: 5203ms

Heap Memory: 80.3MB

Test Classes: digital.pragmatech.demo.BadThreeIT

Context ID: context-2 SpringBootTest 386 beans

Load Time: 6907ms

Heap Memory: 41.8MB

Test Classes: digital.pragmatech.demo.BadTwoIT

Context ID: context-3 WebMvcTest 126 beans

Load Time: 187ms

Heap Memory: 40.0MB

Test Classes: digital.pragmatech.demo.BookControllerIT

Context ID: context-4 DataJpaTest 81 beans

Load Time: 57ms

Heap Memory: 93.2MB

Test Classes: digital.pragmatech.demo.BookRepositoryIT

Context ID: context-5 SpringBootTest 375 beans

Load Time: 5172ms

Heap Memory: 125.2MB

Test Classes: digital.pragmatech.demo.BadOneIT

Context ID: context-6 SpringBootTest 384 beans

Load Time: 5185ms

Heap Memory: 72.5MB

Test Classes: digital.pragmatech.demo.MigrationIT

🔍 Spring Test Context Visualizer

vs.

Spring Context Configurations

This section shows all unique Spring context configurations detected during test execution, grouped by their MergedContextConfiguration.

🔧 config-6

1 test class

384 beans

configurationClasses:

[DemoApplication]

activeProfiles:

[]

contextLoader:

SpringBootContextLoader

properties:

3 properties

parentContext:

contextCustomizers:

DisableObservabilityContextCustomizer DisableReactorResourceFactoryGlobalResourcesContextCustomizerCustomizer DuplicateJsonObjectContextCustomizer DynamicPropertiesContextCustomizer ExcludeFilterContextCustomizer MockitoContextCustomizer OnFailureConditionReportContextCustomizer PropertyMappingContextCustomizer SpringBootTestAnnotation TestRestTemplateContextCustomizer WebDriverContextCustomizer

locations:

contextInitializers:

[]

beanDefinitionCount:

384

Test classes using this configuration:
digital.pragmatech.demo.MigrationIT

Context Complexity: 384 bean definitions

🔧 config-5

1 test class

375 beans

configurationClasses:

[DemoApplication]

activeProfiles:

[test]

contextLoader:

SpringBootContextLoader

properties:

5 properties

parentContext:

contextCustomizers:

locations:

contextInitializers:

[]

beanDefinitionCount:

375

Test classes using this configuration:
digital.pragmatech.demo.BadOneIT

Context Complexity: 375 bean definitions

🔧 config-4

1 test class

81 beans

configurationClasses:

[DemoApplication]

activeProfiles:

[]

contextLoader:

SpringBootContextLoader

properties:

1 properties

parentContext:

contextCustomizers:

DisableAutoConfigurationContextCustomizer DisableObservabilityContextCustomizer DisableReactorResourceFactoryGlobalResourcesContextCustomizerCustomizer DuplicateJsonObjectContextCustomizer DynamicPropertiesContextCustomizer ExcludeFilterContextCustomizer ImportsContextCustomizer MockitoContextCustomizer OnFailureConditionReportContextCustomizer PropertyMappingContextCustomizer SpringBootTestAnnotation TypeExcludeFiltersContextCustomizer WebDriverContextCustomizer

locations:

contextInitializers:

[]

beanDefinitionCount:

Test classes using this configuration:
digital.pragmatech.demo.BookRepositoryIT

Context Complexity: 81 bean definitions

🔧 config-3

1 test class

126 beans

configurationClasses:

[DemoApplication]

activeProfiles:

[]

contextLoader:

SpringBootContextLoader

properties:

1 properties

parentContext:

contextCustomizers:

BeanOverrideContextCustomizer DisableAutoConfigurationContextCustomizer DisableObservabilityContextCustomizer DisableReactorResourceFactoryGlobalResourcesContextCustomizerCustomizer DuplicateJsonObjectContextCustomizer DynamicPropertiesContextCustomizer ExcludeFilterContextCustomizer ImportsContextCustomizer MockitoContextCustomizer OnFailureConditionReportContextCustomizer PropertyMappingContextCustomizer SpringBootTestAnnotation TypeExcludeFiltersContextCustomizer WebDriverContextCustomizer

locations:

contextInitializers:

[]

beanDefinitionCount:

126

Test classes using this configuration:
digital.pragmatech.demo.BookControllerIT

Context Complexity: 126 bean definitions

🔧 config-2

1 test class

386 beans

configurationClasses:

[DemoApplication]

activeProfiles:

[test, integration]

contextLoader:

SpringBootContextLoader

properties:

7 properties

parentContext:

contextCustomizers:

locations:

contextInitializers:

[]

beanDefinitionCount:

386

Test classes using this configuration:
digital.pragmatech.demo.BadTwoIT

Context Complexity: 386 bean definitions

🔧 config-1

1 test class

376 beans

configurationClasses:

[DemoApplication]

activeProfiles:

[test]

contextLoader:

SpringBootContextLoader

properties:

6 properties

parentContext:

contextCustomizers:

DisableObservabilityContextCustomizer DisableReactorResourceFactoryGlobalResourcesContextCustomizerCustomizer DuplicateJsonObjectContextCustomizer DynamicPropertiesContextCustomizer ExcludeFilterContextCustomizer ImportsContextCustomizer MockitoContextCustomizer OnFailureConditionReportContextCustomizer PropertyMappingContextCustomizer SpringBootTestAnnotation TestRestTemplateContextCustomizer WebDriverContextCustomizer

locations:

contextInitializers:

[]

beanDefinitionCount:

376

Test classes using this configuration:
digital.pragmatech.demo.BadThreeIT

Context Complexity: 376 bean definitions

🔧 config-0

1 test class

370 beans

configurationClasses:

[DemoApplication]

activeProfiles:

[test]

contextLoader:

SpringBootContextLoader

properties:

1 properties

parentContext:

contextCustomizers:

locations:

contextInitializers:

[]

beanDefinitionCount:

370

Test classes using this configuration:
digital.pragmatech.demo.GoodIT

Context Complexity: 370 bean definitions

Spring Test Profiler Report

▶ Understanding Spring TestContext Context Caching

How Context Caching Works

🎯 Cache Hit

🔄 Cache Miss

Optimization Tips

📚 Learn More

Test Execution Summary

Cache Size ⓘ

Cache Hits ⓘ

Cache Misses ⓘ

Cache Hit Rate ⓘ

Total Runtime ⓘ

Test Classes ⓘ

Potential Time Savings ⓘ

Context Load Time ⓘ

Need Help?

Spring Context Caching Statistics

🔍 Find Context by Test Class

Filter by Annotation Type

Context Cache Entries

🔍 Spring Test Context Visualizer

Attribute Comparison Details

Test Context A

Test Context B

Spring Context Configurations