google / kotlin
File Age

File age measurements show the distribution of file ages (days since the first commit) and the recency of file updates (days since the latest commit).

Summary
  • Number of files: 31289
  • Daily file updates (only one update per file and date counted): 226762
  • First update: 2010-11-08
  • Latest update: 2022-01-12
  • Days between first and latest update: 4084 (583 weeks, estimated 2915 working days)
  • Active days (at least one file change): 3674
  • Data:
File Change History Overall
File Age Distribution Overall
Days since first update
  • There are 31,288 files with 1,447,776 lines of code in files.
    • 25,614 files that are 366+ days old (1,190,844 lines of code)
    • 2,251 files that are 181-365 days old (108,035 lines of code)
    • 1,993 files that are 91-180 days old (104,695 lines of code)
    • 1,424 files that are 31-90 days old (43,942 lines of code)
    • 6 files that are 1-30 days old (260 lines of code)
82% | 7% | 7% | 3% | <1%
Legend:
366+
181-365
91-180
31-90
1-30
Latest Change Distribution Overall
Days since last update
  • There are 31,288 files with 1,447,776 lines of code in files.
    • 12,852 files have been last changed 366+ days ago (307,492 lines of code)
    • 4,387 files have been last changed 181-365 days ago (255,899 lines of code)
    • 4,879 files have been last changed 91-180 days ago (322,059 lines of code)
    • 8,777 files have been last changed 31-90 days ago (531,491 lines of code)
    • 393 files have been last changed 1-30 days ago (30,835 lines of code)
21% | 17% | 22% | 36% | 2%
Legend:
366+
181-365
91-180
31-90
1-30
File Change History per File Extension
kt, txt, java, kts, xml, gradle, js, json, properties, h, cpp, md, swift, hpp, c, ts, m, bat, sh, groovy, gitignore, html, mjs, in, plist, pro, proto, mm, gitattributes, css, py, storyboard, podspec, yml, patch, flex, pp, editorconfig, adoc, ejs, ll, clang-format, scala, inc
File Age Distribution per Extension
Days since first update
366+
181-365
91-180
31-90
1-30
kt80% | 7% | 8% | 3% | <1%
java96% | <1% | <1% | 2% | 0%
cpp73% | 18% | 2% | 5% | 0%
kts79% | 10% | 4% | 6% | 0%
js96% | <1% | 1% | 2% | 0%
c46% | 52% | 1% | 0% | 0%
h92% | 6% | <1% | 0% | 0%
swift100% | 0% | 0% | 0% | 0%
mm100% | 0% | 0% | 0% | 0%
proto99% | <1% | 0% | 0% | 0%
hpp47% | 31% | 7% | 13% | 0%
groovy100% | 0% | 0% | 0% | 0%
adoc100% | 0% | 0% | 0% | 0%
css100% | 0% | 0% | 0% | 0%
flex100% | 0% | 0% | 0% | 0%
py55% | 44% | 0% | 0% | 0%
pro91% | 8% | 0% | 0% | 0%
ts83% | 0% | 11% | 4% | 0%
html100% | 0% | 0% | 0% | 0%
ejs100% | 0% | 0% | 0% | 0%
m100% | 0% | 0% | 0% | 0%
yml100% | 0% | 0% | 0% | 0%
pp100% | 0% | 0% | 0% | 0%
mjs0% | 100% | 0% | 0% | 0%
inc0% | 100% | 0% | 0% | 0%
Latest Change Distribution per Extension
Days since last update
366+
181-365
91-180
31-90
1-30
kt20% | 17% | 22% | 37% | 1%
java30% | 11% | 15% | 40% | 2%
js85% | 5% | 2% | 5% | <1%
kts6% | 11% | 8% | 66% | 7%
proto33% | 8% | 19% | 38% | 0%
adoc100% | 0% | 0% | 0% | 0%
css80% | 19% | 0% | 0% | 0%
flex38% | 0% | 61% | 0% | 0%
ts32% | 0% | 11% | 55% | 0%
html90% | 9% | 0% | 0% | 0%
pro24% | 16% | 0% | 59% | 0%
cpp0% | 41% | 15% | 24% | 17%
c0% | 31% | 67% | <1% | 0%
swift0% | 100% | 0% | 0% | 0%
h0% | 52% | 39% | 2% | 6%
hpp0% | 23% | 21% | 47% | 6%
mm0% | 26% | 71% | 2% | 0%
py0% | 55% | 44% | 0% | 0%
inc0% | 100% | 0% | 0% | 0%
ejs0% | 100% | 0% | 0% | 0%
mjs0% | 60% | 40% | 0% | 0%
m0% | 100% | 0% | 0% | 0%
yml0% | 100% | 0% | 0% | 0%
pp0% | 100% | 0% | 0% | 0%
groovy0% | 0% | 29% | 70% | 0%
File Change History per Logical Decomposition
primary
primary (file age distribution)
Days since first update
366+
181-365
91-180
31-90
1-30
compiler85% | 5% | 7% | 1% | <1%
libraries85% | 4% | 2% | 6% | <1%
kotlin-native83% | 13% | 1% | 1% | 0%
js91% | 2% | 3% | 2% | 0%
core93% | 2% | 2% | 1% | 0%
plugins78% | 7% | 4% | 9% | 0%
jps96% | 2% | <1% | <1% | <1%
build-common95% | 1% | 2% | 0% | 0%
native28% | 64% | 7% | 0% | 0%
buildSrc92% | 7% | 0% | 0% | 0%
wasm100% | 0% | 0% | 0% | 0%
generators67% | 32% | 0% | 0% | 0%
gradle82% | 15% | 0% | 1% | 0%
ROOT100% | 0% | 0% | 0% | 0%
prepare86% | 6% | 6% | <1% | 0%
benchmarks100% | 0% | 0% | 0% | 0%
spec-docs100% | 0% | 0% | 0% | 0%
idea100% | 0% | 0% | 0% | 0%
ant100% | 0% | 0% | 0% | 0%
test-instrumenter100% | 0% | 0% | 0% | 0%
analysis0% | 20% | 63% | 15% | 0%
primary (latest change distribution)
Days since last update
366+
181-365
91-180
31-90
1-30
compiler22% | 12% | 21% | 42% | 1%
js66% | 10% | 14% | 8% | 0%
libraries19% | 23% | 30% | 24% | 1%
plugins27% | 19% | 14% | 37% | <1%
core25% | 19% | 26% | 23% | 3%
build-common13% | 10% | 44% | 31% | 0%
native5% | 49% | 39% | 3% | 1%
spec-docs100% | 0% | 0% | 0% | 0%
idea100% | 0% | 0% | 0% | 0%
benchmarks63% | 0% | 21% | 15% | 0%
ant95% | 0% | 0% | 4% | 0%
buildSrc6% | 28% | 6% | 58% | 0%
generators6% | 65% | 11% | 16% | 0%
gradle18% | 25% | <1% | 55% | 0%
test-instrumenter80% | 0% | 0% | 19% | 0%
kotlin-native<1% | 45% | 22% | 27% | 4%
wasm1% | 0% | 74% | 24% | 0%
prepare2% | 15% | 9% | 72% | 0%
jps0% | 1% | <1% | 42% | 55%
analysis0% | 0% | 26% | 72% | 1%
ROOT0% | 0% | 0% | 0% | 100%
Oldest Files (Top 20)
File# lines# unitslast modified
(days ago)		created
(days ago)		# changes
Smoke.kt
in compiler/testData/compiler/smoke
 4 1 3664 3742 6
MapOfKString.java
in compiler/testData/compileJavaAgainstKotlin/method
 10 1 2301 3704 8
MapOfStringIntQ.java
in compiler/testData/compileJavaAgainstKotlin/method
 10 1 2301 3704 5
ListOfInt.java
in compiler/testData/compileJavaAgainstKotlin/method
 9 1 2301 3704 5
ListOfString.java
in compiler/testData/compileJavaAgainstKotlin/method
 9 1 2301 3704 5
ListOfT.java
in compiler/testData/compileJavaAgainstKotlin/method
 9 1 2301 3704 8
Vararg.java
in compiler/testData/compileJavaAgainstKotlin/method
 9 - 2301 3704 5
ArrayOfIntArray.java
in compiler/testData/compileJavaAgainstKotlin/method
 7 - 2301 3704 5
ArrayOfIntegerArray.java
in compiler/testData/compileJavaAgainstKotlin/method
 7 - 2301 3704 5
Simple.java
in compiler/testData/compileJavaAgainstKotlin/class
 6 - 2876 3704 6
Any.java
in compiler/testData/compileJavaAgainstKotlin/method
 6 - 2301 3704 5
GenericArray.java
in compiler/testData/compileJavaAgainstKotlin/method
 6 1 2301 3704 8
Hello.java
in compiler/testData/compileJavaAgainstKotlin/method
 6 1 2301 3704 5
Int.java
in compiler/testData/compileJavaAgainstKotlin/method
 6 - 2301 3704 5
IntArray.java
in compiler/testData/compileJavaAgainstKotlin/method
 6 - 2301 3704 5
IntWithDefault.java
in compiler/testData/compileJavaAgainstKotlin/method
 6 - 2301 3704 5
IntegerArray.java
in compiler/testData/compileJavaAgainstKotlin/method
 6 - 2301 3704 5
Void.java
in compiler/testData/compileJavaAgainstKotlin/method
 6 - 2301 3704 5
Simple.kt
in compiler/testData/compileJavaAgainstKotlin/class
 2 - 2876 3704 3
Any.kt
in compiler/testData/compileJavaAgainstKotlin/method
 2 - 1762 3704 4
Files Not Recently Changed (Top 20)
File# lines# unitslast modified
(days ago)		created
(days ago)		# changes
Smoke.kt
in compiler/testData/compiler/smoke
 4 1 3664 3742 6
logs.html
in js/js.translator/qunit
 13 - 3520 3531 2
headless.html
in js/js.translator/qunit
 24 - 3520 3531 2
qunit.css
in js/js.translator/qunit
 162 - 3520 3531 2
noAssertionsForKotlinMain.kt
in compiler/testData/codegen/notNullAssertions
 7 1 3408 3408 1
publicFinalClass.kt
in compiler/testData/writeFlags/class/accessFlags
 2 - 3394 3394 1
publicFinalInnerClass.kt
in compiler/testData/writeFlags/class/accessFlags
 4 - 3394 3394 1
object.kt
in compiler/testData/writeFlags/class/visibility/public
 2 - 3344 3344 1
class.kt
in compiler/testData/writeFlags/class/visibility/public
 2 - 3344 3344 1
object.kt
in compiler/testData/writeFlags/class/visibility/internal
 2 - 3344 3344 1
class.kt
in compiler/testData/writeFlags/class/visibility/internal
 2 - 3344 3344 1
innerObject.kt
in compiler/testData/writeFlags/class/visibility/public
 4 - 3344 3344 1
innerClass.kt
in compiler/testData/writeFlags/class/visibility/public
 4 - 3344 3344 1
innerObject.kt
in compiler/testData/writeFlags/class/visibility/private
 4 - 3344 3344 1
innerClass.kt
in compiler/testData/writeFlags/class/visibility/private
 4 - 3344 3344 1
innerObject.kt
in compiler/testData/writeFlags/class/visibility/internal
 4 - 3344 3344 1
innerClass.kt
in compiler/testData/writeFlags/class/visibility/internal
 4 - 3344 3344 1
public.kt
in compiler/testData/writeFlags/property/visibility
 4 - 3343 3344 2
private.kt
in compiler/testData/writeFlags/property/visibility
 4 - 3343 3344 2
internal.kt
in compiler/testData/writeFlags/property/visibility
 4 - 3343 3344 2
Most Recently Created Files (Top 20)
File# lines# unitslast modified
(days ago)		created
(days ago)		# changes
#U0421.kt
in jps/jps-plugin/testData/incremental/pureKotlin/sealedClassesAddImplements
 2 -
WhenEvaluatedAndroidOrderingTest.kt
in libraries/tools/kotlin-gradle-plugin/src/functionalTest/kotlin
 46 1 19 19 1
ResolutionWithStubTypesChecker.kt
in compiler/frontend/src/org/jetbrains/kotlin/resolve/checkers
 164 1 21 21 1
CallCheckerWithAdditionalResolve.kt
in compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/checkers
 15 - 21 21 1
InferenceUtils.kt
in compiler/resolution/src/org/jetbrains/kotlin/util
 13 - 21 21 1
test.kt
in jps/jps-plugin/testData/general/Jre11/src
 12 2 21 21 1
builderInferenceUtil.kt
in compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/util
 10 1 21 21 1
localClasses.kt
in analysis/analysis-api/testData/components/symbolDeclarationOverridesProvider/isSubclassOf
 4 1 31 31 1
arrayAssignementTarget.kt
in analysis/analysis-api/testData/components/expressionTypeProvider/expressionType/assignment
 3 - 31 31 1
arrayAssignmentTargetUnresovledSet.kt
in analysis/analysis-api/testData/components/expressionTypeProvider/expressionType/assignment
 3 - 31 31 1
arrayCompoundAssignementTarget.kt
in analysis/analysis-api/testData/components/expressionTypeProvider/expressionType/assignment
 3 - 31 31 1
IntIncr.kt
in compiler/ir/backend.jvm/codegen/src/org/jetbrains/kotlin/backend/jvm/intrinsics
 30 1 32 32 1
DelegatedPropertiesTest.kt
in plugins/atomicfu/atomicfu-compiler/testData/box
 118 12 33 33 1
kt50577.kt
in compiler/testData/codegen/box/casts
 22 2 33 33 1
B.kt
in jps/jps-plugin/testData/incremental/pureKotlin/companionConstantChanged
 9 1 33 33 1
C.kt
in jps/jps-plugin/testData/incremental/pureKotlin/companionConstantChanged
 9 1 33 33 1
DoNotUseConstant.kt
in jps/jps-plugin/testData/incremental/pureKotlin/companionConstantChanged
 9 1 33 33 1
JavaClass.java
in jps/jps-plugin/testData/incremental/withJava/javaUsedInKotlin/constantPropertyChanged
 7 - 33 33 1
Foo.java
in jps/jps-plugin/testData/incremental/withJava/javaUsedInKotlin/rawErrorTypeDuringSerialization
 7 1 33 33 1
main.kt
in jps/jps-plugin/testData/incremental/withJava/javaUsedInKotlin/rawErrorTypeDuringSerialization
 7 1 33 33 1
Most Recently Changed Files (Top 20)
File# lines# unitslast modified
(days ago)		created
(days ago)		# changes
#U0421.kt
in jps/jps-plugin/testData/incremental/pureKotlin/sealedClassesAddImplements
 2 -
AbstractSuspendFunctionsLowering.kt
in compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower
 588 15 19 1029 41
KotlinBuilder.kt
in jps/jps-plugin/src/org/jetbrains/kotlin/jps/build
 583 9 19 2701 185
facetSerialization.kt
in jps/jps-common/src/org/jetbrains/kotlin/config
 384 1 19 1791 48
KotlinJvmModuleBuildTarget.kt
in jps/jps-plugin/src/org/jetbrains/kotlin/jps/targets
 320 8 19 1264 19
JpsKotlinCompilerRunner.kt
in jps/jps-plugin/src/org/jetbrains/kotlin/compilerRunner
 307 6 19 1915 45
KotlinModuleBuildTarget.kt
in jps/jps-plugin/src/org/jetbrains/kotlin/jps/targets
 261 11 19 1264 19
KotlinCompileContext.kt
in jps/jps-plugin/src/org/jetbrains/kotlin/jps/build
 225 7 19 1264 15
KotlinMultiplatformPlugin.kt
in libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin
 222 8 19 1874 33
KotlinFacetSettings.kt
in jps/jps-common/src/org/jetbrains/kotlin/config
 221 5 19 1923 67
KotlinJsModuleBuildTarget.kt
in jps/jps-plugin/src/org/jetbrains/kotlin/jps/targets
 183 4 19 1264 10
KotlinChunk.kt
in jps/jps-plugin/src/org/jetbrains/kotlin/jps/build
 173 4 19 1264 12
Logging.cpp
in kotlin-native/runtime/src/main/cpp
 164 16 19 159 3
FSOperationsHelper.kt
in jps/jps-plugin/src/org/jetbrains/kotlin/jps/build
 137 7 19 2253 16
Serializer.kt
in jps/jps-plugin/src/org/jetbrains/kotlin/jps/model
 98 9 19 1392 5
CompilerRunnerUtil.kt
in jps/jps-plugin/src/org/jetbrains/kotlin/compilerRunner
 95 3 19 1406 12
build.gradle.kts
in jps/jps-plugin
 92 - 19 1643 50
KotlinSourceRootProvider.kt
in jps/jps-plugin/src/org/jetbrains/kotlin/jps/build
 87 1 19 1343 9
KotlinCommonModuleBuildTarget.kt
in jps/jps-plugin/src/org/jetbrains/kotlin/jps/targets
 84 2 19 1264 5
ThreadSuspension.cpp
in kotlin-native/runtime/src/mm/cpp
 80 8 19 245 10