Improve performance of Kotlin code
Recipe ID
org.openrewrite.kotlin.performance.ImproveKotlinPerformance$KtRecipeArtifact
io.moderne.recipe:recipes-kotlinAutofix-only performance bundle: collapses allocating call chains (filter/map/sort/reverse), promotes Compose primitive state holders, and rewrites StringBuilder.length to size. Excludes the search-only Find* recipes so the run output is just diffs, not a flood of search results.
Usage
This recipe has no required configuration options. You’ll need the Moderne CLI configured before running the command below.
mod run . --recipe org.openrewrite.kotlin.performance.ImproveKotlinPerformance$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.
- Collapse
filter { p }.<terminal>()chainsorg.openrewrite.kotlin.performance.CollapseFilterTerminals$KtRecipe - Collapse
sorted().first/last()andreversed().first/last()chainsorg.openrewrite.kotlin.performance.CollapseSortAndReverse$KtRecipe - Use primitive
mutable<Int|Long|Float|Double>StateOfin Composeorg.openrewrite.kotlin.performance.UseComposePrimitiveStateOf$KtRecipe - Use
sb.lengthinstead ofsb.toString().lengthorg.openrewrite.kotlin.performance.UseLengthForStringBuilderSize$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