Places in code with 6 or more lines that are exactly the same.
Intro
- For duplication, we look at places in code where there are 6 or more lines of code that are exactly the same.
- Before duplication is calculated, the code is cleaned to remove empty lines, comments, and frequently duplicated constructs such as imports.
- You should aim at having as little as possible (<5%) of duplicated code as high-level of duplication can lead to maintenance difficulties, poor factoring, and logical contradictions.
- To learn more about duplications and techniques for eliminating duplication, Sokrates recommends the following resources:
- Avoid Repetition, MartinFlower.com (IEEE Software article)
- Refactoring duplicated code, sourcemaking.com
- Beck Design Rules, MartinFowler.com
- DRY (Don't Repeat Yourself) Principle, Wikipedia
- The Cut-and-Paste Programming Software Development Anti-Pattern, sourcemaking.com
- Code Smells / Duplicated Code, Jeff Atwood, codinghorror.com:
- "Duplicated code is the bane of software development. Stamp out duplication whenever possible. You should always be on the lookout for more subtle cases of near-duplication, too. Don't Repeat Yourself!"
- Reducing Coupling, MartinFlower.com (IEEE Software article):
- "There are several ways to describe coupling, but it boils down to this: If changing one module in a program requires changing another module, then coupling exists. ... Duplication always implies coupling, because changing one piece of duplicate code implies changing the other."
Duplication Overall
- 16% duplication:
- 58,497 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 9,914 duplicated lines
- 1,642 duplicates
Duplication per Extension
Duplication per Component (primary)
Duplication Between Components (50+ lines)
Open 3D force graph...
Show more details on duplication between components...
From Component
--> To Component
Duplicated
Lines
File Pairs
Details
jetbrains-core (<1%)
--> jetbrains-ultimate (6%)
562
59 file pairs
details...
jetbrains-core (<1%)
--> jetbrains-rider (3%)
204
11 file pairs
details...
jetbrains-rider (1%)
--> jetbrains-ultimate (<1%)
80
5 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| jetbrains-core (<1%) --> jetbrains-ultimate (6%) |
562 | 59 file pairs | details... |
| jetbrains-core (<1%) --> jetbrains-rider (3%) |
204 | 11 file pairs | details... |
| jetbrains-rider (1%) --> jetbrains-ultimate (<1%) |
80 | 5 file pairs | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 140 | x 2 | jetbrains-rider/src-211-...ins/services/clouddebugjetbrains-rider/src-213+...ins/services/clouddebug |  DotNetDebuggerSupport.ktDotNetDebuggerSupport.kt |
4:257 (61%)4:257 (61%) | view |
| 88 | x 2 | jetbrains-rider/src-211-...ins/services/clouddebugjetbrains-rider/src-213+...ins/services/clouddebug | DotNetDebuggerSupport.ktDotNetDebuggerSupport.kt |
259:397 (38%)259:397 (38%) | view |
| 65 | x 2 | jetbrains-ultimate/tst-212/com/goide/vgojetbrains-ultimate/tst-213+/com/goide/vgo |  VgoTestUtil.javaVgoTestUtil.java |
39:123 (75%)40:124 (75%) | view |
| 59 | x 2 | jetbrains-core/tst/softw...services/cloudformationjetbrains-core/tst/softw...services/cloudformation | CreateWaiterTest.ktUpdateWaiterTest.kt |
112:183 (49%)97:168 (53%) | view |
| 55 | x 2 | jetbrains-core/tst/softw...ains/services/telemetryjetbrains-core/tst/softw...ains/services/telemetry | DefaultTelemetryPublisherTest.ktDefaultTelemetryPublisherTest.kt |
38:100 (42%)106:168 (42%) | view |
| 50 | x 2 | jetbrains-rider/src-211-.../services/lambda/dotnetjetbrains-rider/src-213+.../services/lambda/dotnet | DotnetDebugUtils.ktDotnetDebugUtils.kt |
4:120 (45%)4:117 (50%) | view |
| 43 | x 2 | jetbrains-ultimate/tst-211/com/goide/vgojetbrains-ultimate/tst-212/com/goide/vgo | VgoTestUtil.javaVgoTestUtil.java |
67:124 (50%)67:124 (50%) | view |
| 42 | x 2 | jetbrains-ultimate/tst-211/com/goide/vgojetbrains-ultimate/tst-213+/com/goide/vgo | VgoTestUtil.javaVgoTestUtil.java |
67:123 (48%)68:124 (48%) | view |
| 36 | x 2 | jetbrains-rider/src-211-.../services/lambda/dotnetjetbrains-rider/src-213+.../services/lambda/dotnet | DotnetDebugUtils.ktDotnetDebugUtils.kt |
122:178 (32%)119:175 (36%) | view |
| 25 | x 2 | jetbrains-core/src/softw...s/services/lambda/stepsjetbrains-core/src/softw...s/services/lambda/steps | LambdaWorkflows.ktLambdaWorkflows.kt |
77:102 (11%)166:191 (11%) | view |
| 25 | x 2 | jetbrains-core/src/softw...s/services/lambda/stepsjetbrains-core/src/softw...s/services/lambda/steps | LambdaWorkflows.ktLambdaWorkflows.kt |
37:64 (11%)125:152 (11%) | view |
| 24 | x 2 | jetbrains-core/tst/softw...ces/cloudformation/yamljetbrains-core/tst/softw...ins/services/lambda/sam | YamlCloudFormationTemplateTest.ktSamCommonTest.kt |
377:400 (7%)230:253 (12%) | view |
| 22 | x 2 | jetbrains-ultimate/tst-211/com/goide/vgojetbrains-ultimate/tst-213+/com/goide/vgo | VgoTestUtil.javaVgoTestUtil.java |
39:63 (25%)40:64 (25%) | view |
| 22 | x 2 | jetbrains-ultimate/tst-211/com/goide/vgojetbrains-ultimate/tst-212/com/goide/vgo | VgoTestUtil.javaVgoTestUtil.java |
39:63 (25%)39:63 (25%) | view |
| 22 | x 2 | jetbrains-core/tst/softw...ains/services/s3/editorjetbrains-core/tst/softw...ains/services/s3/editor | S3TreeObjectNodeTest.ktS3TreeObjectNodeTest.kt |
258:282 (7%)308:332 (7%) | view |
| 21 | x 2 | jetbrains-core/tst/softw...services/cloudformationjetbrains-core/tst/softw...services/cloudformation | CreateWaiterTest.ktDeleteWaiterTest.kt |
112:138 (17%)110:136 (17%) | view |
| 21 | x 2 | jetbrains-core/tst/softw...re/credentials/profilesjetbrains-core/tst/softw...re/credentials/profiles | ProfileCredentialProviderFactoryTest.ktProfileCredentialProviderFactoryTest.kt |
292:316 (4%)345:369 (4%) | view |
| 21 | x 2 | jetbrains-core/tst/softw...ns/services/lambda/javajetbrains-core/tst/softw...ns/services/lambda/java | JavaLambdaHandlerResolverTest.ktJavaLambdaLineMarkerTest.kt |
30:62 (6%)29:61 (6%) | view |
| 21 | x 2 | jetbrains-core/tst/softw...services/cloudformationjetbrains-core/tst/softw...services/cloudformation | DeleteWaiterTest.ktUpdateWaiterTest.kt |
110:136 (17%)97:123 (18%) | view |
| 20 | x 2 | jetbrains-ultimate/tst-212/com/goide/vgojetbrains-ultimate/tst-213+/com/goide/vgo | VgoTestUtil.javaVgoTestUtil.java |
126:153 (23%)127:154 (23%) | view |
Duplicated Units
The list of top 20 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 59 | x 2 | jetbrains-core/tst/softw...ains/services/telemetryjetbrains-core/tst/softw...ains/services/telemetry | DefaultTelemetryPublisherTest.ktDefaultTelemetryPublisherTest.kt |
37:102 105:170 | view |
| 40 | x 2 | jetbrains-rider/src-213+...ins/services/clouddebugjetbrains-rider/src-211-...ins/services/clouddebug | DotNetDebuggerSupport.ktDotNetDebuggerSupport.kt |
90:135 90:135 | view |
| 19 | x 2 | jetbrains-core/tst/softw...kits/jetbrains/servicesjetbrains-core/tst/softw...kits/jetbrains/services | RoleValidationTest.ktRoleValidationTest.kt |
58:77 80:99 | view |
| 19 | x 2 | jetbrains-rider/src-213+...ins/services/clouddebugjetbrains-rider/src-211-...ins/services/clouddebug | DotNetDebuggerSupport.ktDotNetDebuggerSupport.kt |
180:204 180:204 | view |
| 17 | x 2 | jetbrains-rider/src-213+...ins/services/clouddebugjetbrains-rider/src-211-...ins/services/clouddebug | DotNetDebuggerSupport.ktDotNetDebuggerSupport.kt |
137:158 137:158 | view |
| 15 | x 2 | jetbrains-core/tst/softw.../services/lambda/deployjetbrains-core/tst/softw.../services/lambda/deploy | DeploySamApplicationValidatorTest.ktDeploySamApplicationValidatorTest.kt |
227:243 246:262 | view |
| 15 | x 2 | jetbrains-rider/tst/soft.../lambda/execution/localjetbrains-rider/tst/soft.../lambda/execution/local | DotNetLocalLambdaRunConfigurationTest.ktDotNetLocalLambdaRunConfigurationTest.kt |
63:79 82:98 | view |
| 14 | x 2 | jetbrains-rider/src-213+...ins/services/clouddebugjetbrains-rider/src-211-...ins/services/clouddebug | DotNetDebuggerSupport.ktDotNetDebuggerSupport.kt |
160:178 160:178 | view |
| 12 | x 2 | jetbrains-rider/testData...dlersApp/src/HelloWorldjetbrains-rider/testData...dlersApp/src/HelloWorld |  FunctionWithOnlyLambdaContext.csFunctionWithObjectReturn.cs |
17:30 17:30 | view |
| 12 | x 3 | jetbrains-ultimate/tst-211/com/goide/vgojetbrains-ultimate/tst-213+/com/goide/vgojetbrains-ultimate/tst-212/com/goide/vgo | VgoTestUtil.javaVgoTestUtil.javaVgoTestUtil.java |
82:95 83:96 82:95 | view |
| 11 | x 2 | jetbrains-core/tst/softw.../services/lambda/uploadjetbrains-core/tst/softw.../services/lambda/upload | CreateLambdaFunctionActionTest.ktCreateLambdaFunctionActionTest.kt |
117:131 134:148 | view |
| 11 | x 3 | jetbrains-ultimate/tst-211/com/goide/vgojetbrains-ultimate/tst-213+/com/goide/vgojetbrains-ultimate/tst-212/com/goide/vgo | VgoTestUtil.javaVgoTestUtil.javaVgoTestUtil.java |
108:120 109:121 108:120 | view |
| 11 | x 2 | jetbrains-ultimate/tst/s...s/jetbrains/utils/rulesjetbrains-ultimate/tst/s...s/jetbrains/utils/rules | NodeJsCodeInsightTestFixtureRule.ktNodeJsCodeInsightTestFixtureRule.kt |
45:57 86:98 | view |
| 10 | x 2 | jetbrains-ultimate/tst/s.../services/lambda/nodejsjetbrains-ultimate/tst/s.../services/lambda/nodejs | NodeJsLambdaTypeScriptHandlerResolver...NodeJsLambdaTypeScriptHandlerResolver... |
26:37 195:206 | view |
| 9 | x 3 | jetbrains-ultimate/tst-211/com/goide/vgojetbrains-ultimate/tst-213+/com/goide/vgojetbrains-ultimate/tst-212/com/goide/vgo | VgoTestUtil.javaVgoTestUtil.javaVgoTestUtil.java |
145:154 146:155 145:154 | view |
| 8 | x 2 | jetbrains-core/src/softw.../services/lambda/pythonjetbrains-core/src/softw.../services/lambda/python | PythonSamProjectWizard.ktPythonSamProjectWizard.kt |
48:56 75:83 | view |
| 8 | x 2 | jetbrains-core/tst/softw...ervices/cloudwatch/logsjetbrains-core/tst/softw...ervices/cloudwatch/logs | LogGroupSearchActorTest.ktLogStreamListActorTest.kt |
84:92 156:164 | view |
| 8 | x 2 | jetbrains-core/tst/softw...ervices/cloudwatch/logsjetbrains-core/tst/softw...ervices/cloudwatch/logs | LogStreamFilterActorTest.ktLogGroupActorTest.kt |
113:121 79:87 | view |
| 8 | x 3 | jetbrains-ultimate/tst-211/com/goide/vgojetbrains-ultimate/tst-213+/com/goide/vgojetbrains-ultimate/tst-212/com/goide/vgo | VgoTestUtil.javaVgoTestUtil.javaVgoTestUtil.java |
71:79 72:80 71:79 | view |
| 7 | x 2 | jetbrains-core/tst/softw...ces/cloudformation/yamljetbrains-core/tst/softw...ces/cloudformation/yaml | YamlCloudFormationTemplateTest.ktYamlCloudFormationTemplateTest.kt |
287:295 298:306 | view |