Find expensive allocations inside collection lambdas
Recipe ID
org.openrewrite.kotlin.performance.FindAllocationsInCollectionLambdas$KtRecipeArtifact
io.moderne.recipe:recipes-kotlinSearch-only recipes that flag heavyweight allocations sitting inside the trailing lambda of a map / filter / forEach / flatMap call. Each such lambda runs once per element — the same allocation-cost profile as a loop body.
Usage
This recipe has no required configuration options. You’ll need the Moderne CLI configured before running the command below.
mod run . --recipe org.openrewrite.kotlin.performance.FindAllocationsInCollectionLambdas$KtRecipeIf the recipe isn’t available locally, install it with:
mod config recipes jar install io.moderne.recipe:recipes-kotlin:0.2.0Definition
This recipe runs the following recipes in order.
- Find
Regexallocations inside collection lambdasorg.openrewrite.kotlin.performance.FindRegexAllocationsInCollectionLambdas$KtRecipe - Find
Pattern.compilecalls inside collection lambdasorg.openrewrite.kotlin.performance.FindPatternCompileInCollectionLambdas$KtRecipe - Find
String.formatcalls inside collection lambdasorg.openrewrite.kotlin.performance.FindStringFormatInCollectionLambdas$KtRecipe - Find
LoggerFactory.getLoggercalls inside collection lambdasorg.openrewrite.kotlin.performance.FindLoggerFactoryGetLoggerInCollectionLambdas$KtRecipe - Find Jackson
ObjectMapper()allocations inside collection lambdasorg.openrewrite.kotlin.performance.FindObjectMapperInCollectionLambdas$KtRecipe - Find
Gson()allocations inside collection lambdasorg.openrewrite.kotlin.performance.FindGsonInCollectionLambdas$KtRecipe
Data tables
Structured output this recipe can produce.
- Source files that had resultsSource files that were modified by the recipe run.
org.openrewrite.table.SourcesFileResults - Source files that had search resultsSearch results that were found during the recipe run.
org.openrewrite.table.SearchResults - Source files that errored on a recipeThe details of all errors produced by a recipe run.
org.openrewrite.table.SourcesFileErrors - Recipe performanceStatistics used in analyzing the performance of recipes.
org.openrewrite.table.RecipeRunStats