Moderne licensed

Improve performance of Kotlin code

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

Autofix-only performance bundle: collapses allocating call chains (filter/map/sort/reverse), promotes Compose primitive state holders, and rewrites StringBuilder.length to size. Excludes the search-only Find* recipes so the run output is just diffs, not a flood of search results.

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.ImproveKotlinPerformance$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.ImproveKotlinPerformance$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.

Collapse filter { p }.<terminal>() chainsorg.openrewrite.kotlin.performance.CollapseFilterTerminals$KtRecipe
Collapse sorted().first/last() and reversed().first/last() chainsorg.openrewrite.kotlin.performance.CollapseSortAndReverse$KtRecipe
Use primitive mutable<Int|Long|Float|Double>StateOf in Composeorg.openrewrite.kotlin.performance.UseComposePrimitiveStateOf$KtRecipe
Use sb.length instead of sb.toString().lengthorg.openrewrite.kotlin.performance.UseLengthForStringBuilderSize$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