Moderne licensed

Find expensive allocations on hot paths

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

Search-only recipes that flag heavyweight allocations sitting on a path the runtime exercises repeatedly — inside a loop, inside View.onDraw/onMeasure/onLayout. Each match shows up as a SearchResult for review; nothing is rewritten automatically.

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.FindAllocationsInHotPaths$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.FindAllocationsInHotPaths$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 loopsorg.openrewrite.kotlin.performance.FindRegexAllocationsInLoops$KtRecipe
Find Pattern.compile allocations inside loopsorg.openrewrite.kotlin.performance.FindPatternCompileInLoops$KtRecipe
Find SimpleDateFormat allocations inside loopsorg.openrewrite.kotlin.performance.FindSimpleDateFormatInLoops$KtRecipe
Find DateTimeFormatter.ofPattern allocations inside loopsorg.openrewrite.kotlin.performance.FindDateTimeFormatterInLoops$KtRecipe
Find BigDecimal("...") allocations inside loopsorg.openrewrite.kotlin.performance.FindBigDecimalFromStringInLoops$KtRecipe
Find BigInteger("...") allocations inside loopsorg.openrewrite.kotlin.performance.FindBigIntegerFromStringInLoops$KtRecipe
Find BigInteger.valueOf(long) calls inside loopsorg.openrewrite.kotlin.performance.FindBigIntegerValueOfInLoops$KtRecipe
Find Calendar.getInstance() calls inside loopsorg.openrewrite.kotlin.performance.FindCalendarGetInstanceInLoops$KtRecipe
Find Locale(...) allocations inside loopsorg.openrewrite.kotlin.performance.FindLocaleConstructionInLoops$KtRecipe
Find File(...).bufferedReader() calls inside loopsorg.openrewrite.kotlin.performance.FindFileNewBufferedReaderInLoops$KtRecipe
Find URL("...") allocations inside loopsorg.openrewrite.kotlin.performance.FindURLConstructorInLoops$KtRecipe
Find URI("...") allocations inside loopsorg.openrewrite.kotlin.performance.FindURIConstructorInLoops$KtRecipe
Find Base64.getDecoder() calls inside loopsorg.openrewrite.kotlin.performance.FindBase64GetDecoderInLoops$KtRecipe
Find Charset.forName(...) calls inside loopsorg.openrewrite.kotlin.performance.FindCharsetForNameInLoops$KtRecipe
Find Optional.get() calls inside loopsorg.openrewrite.kotlin.performance.FindOptionalGetInLoops$KtRecipe
Find LoggerFactory.getLogger calls inside loopsorg.openrewrite.kotlin.performance.FindLoggerFactoryGetLoggerInLoops$KtRecipe
Find Class.forName calls inside loopsorg.openrewrite.kotlin.performance.FindClassForNameInLoops$KtRecipe
Find String.format calls inside loopsorg.openrewrite.kotlin.performance.FindStringFormatInLoops$KtRecipe
Find MessageDigest.getInstance calls inside loopsorg.openrewrite.kotlin.performance.FindMessageDigestGetInstanceInLoops$KtRecipe
Find Jackson ObjectMapper() allocations inside loopsorg.openrewrite.kotlin.performance.FindObjectMapperInLoops$KtRecipe
Find Gson() allocations inside loopsorg.openrewrite.kotlin.performance.FindGsonInLoops$KtRecipe
Find graphics allocations inside View.onDraworg.openrewrite.kotlin.performance.FindAllocationsInOnDraw$KtRecipe
Find graphics allocations inside View.onMeasureorg.openrewrite.kotlin.performance.FindAllocationsInOnMeasure$KtRecipe
Find graphics allocations inside View.onLayoutorg.openrewrite.kotlin.performance.FindAllocationsInOnLayout$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