Moderne licensed

Find expensive allocations inside collection lambdas

Recipe IDorg.openrewrite.kotlin.performance.FindAllocationsInCollectionLambdas$KtRecipeArtifactio.moderne.recipe:recipes-kotlin

Search-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.

Composite recipeProprietary

Add to your build

Get a download tokenThis recipe is Moderne licensed, so the token must belong to a Moderne customer. It replaces YOUR_DOWNLOAD_TOKEN below.

~/.gradle/gradle.properties

codeGenomeUsername=you@example.com
codeGenomeToken=YOUR_DOWNLOAD_TOKEN

build.gradle.kts

plugins {
    id("org.openrewrite.rewrite") version("latest.release")
}

rewrite {
    activeRecipe("org.openrewrite.kotlin.performance.FindAllocationsInCollectionLambdas$KtRecipe")
}

repositories {
    mavenCentral()
    maven {
        url = uri("https://artifacts.codegenomeproject.org/maven")
        credentials {
            username = providers.gradleProperty("codeGenomeUsername").get()
            password = providers.gradleProperty("codeGenomeToken").get()
        }
    }
}

dependencies {
    rewrite("io.moderne.recipe:recipes-kotlin:0.5.0")
}

Then run

./gradlew rewriteRun

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$KtRecipe

If the recipe isn’t available locally, install it with:

mod config recipes jar install io.moderne.recipe:recipes-kotlin:RELEASE

Definition

This recipe runs the following recipes in order.

Find Regex allocations inside collection lambdasorg.openrewrite.kotlin.performance.FindRegexAllocationsInCollectionLambdas$KtRecipe
Find Pattern.compile calls inside collection lambdasorg.openrewrite.kotlin.performance.FindPatternCompileInCollectionLambdas$KtRecipe
Find String.format calls inside collection lambdasorg.openrewrite.kotlin.performance.FindStringFormatInCollectionLambdas$KtRecipe
Find LoggerFactory.getLogger calls inside collection lambdasorg.openrewrite.kotlin.performance.FindLoggerFactoryGetLoggerInCollectionLambdas$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