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:
- 34,371 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 5,654 duplicated lines
- 746 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
BASE/src (3%)
--> WEB/Src (3%)
932
14 file pairs
details...
NETCORE/Schema (100%)
--> WEB/Schema (100%)
196
1 file pair
details...
BASE/Schema (71%)
--> NETCORE/Schema (82%)
162
1 file pair
details...
BASE/Schema (71%)
--> WEB/Schema (82%)
162
1 file pair
details...
NETCORE/src (3%)
--> WEB/Src (<1%)
143
8 file pairs
details...
BASE (60%)
--> WEB (22%)
101
8 file pairs
details...
BASE (48%)
--> LOGGING (70%)
82
5 file pairs
details...
LOGGING/src (2%)
--> NETCORE/src (1%)
70
6 file pairs
details...
LOGGING/src (2%)
--> WEB/Src (<1%)
69
25 file pairs
details...
NETCORE (14%)
--> WEB (10%)
50
2 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| BASE/src (3%) --> WEB/Src (3%) |
932 | 14 file pairs | details... |
| NETCORE/Schema (100%) --> WEB/Schema (100%) |
196 | 1 file pair | details... |
| BASE/Schema (71%) --> NETCORE/Schema (82%) |
162 | 1 file pair | details... |
| BASE/Schema (71%) --> WEB/Schema (82%) |
162 | 1 file pair | details... |
| NETCORE/src (3%) --> WEB/Src (<1%) |
143 | 8 file pairs | details... |
| BASE (60%) --> WEB (22%) |
101 | 8 file pairs | details... |
| BASE (48%) --> LOGGING (70%) |
82 | 5 file pairs | details... |
| LOGGING/src (2%) --> NETCORE/src (1%) |
70 | 6 file pairs | details... |
| LOGGING/src (2%) --> WEB/Src (<1%) |
69 | 25 file pairs | details... |
| NETCORE (14%) --> WEB (10%) |
50 | 2 file pairs | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 283 | x 2 | BASE/src/Microsoft.Appli.../Implementation/TracingWEB/Src/WindowsServer/WindowsServer/Implementation |  CoreEventSource.csMetricManager.cs |
52:433 (59%)982:1363 (44%) | view |
| 98 | x 2 | NETCORE/SchemaWEB/Schema |  generateSchema.ps1generateSchema.ps1 |
1:126 (100%)1:126 (100%) | view |
| 81 | x 2 | BASE/SchemaNETCORE/Schema | generateSchema.ps1generateSchema.ps1 |
14:113 (71%)14:113 (82%) | view |
| 81 | x 2 | BASE/SchemaWEB/Schema | generateSchema.ps1generateSchema.ps1 |
14:113 (71%)14:113 (82%) | view |
| 72 | x 2 | WEB/Src/PerformanceColle...plementation/QuickPulseWEB/Src/PerformanceColle...plementation/QuickPulse | QuickPulseServiceClient.csQuickPulseServiceClient.cs |
48:137 (34%)53:142 (30%) | view |
| 68 | x 2 | BASE/src/Microsoft.Appli...sibility/ImplementationBASE/src/ServerTelemetryChannel/Implementation | WeakConcurrentRandom.csWeakConcurrentRandom.cs |
13:215 (98%)7:209 (98%) | view |
| 54 | x 2 | WEB/Src/PerformanceColle...ckPulse/Process/PerfLibWEB/Src/PerformanceColle...ckPulse/Process/PerfLib | NativeMethods.csNativeMethods.cs |
84:155 (50%)84:156 (50%) | view |
| 53 | x 2 | BASE/src/ServerTelemetry.../BackwardsCompatabilityBASE/src/ServerTelemetryChannel/Implementation | SamplingPercentageEstimatorSettings.csSamplingPercentageEstimatorSettings.cs |
10:193 (96%)9:192 (98%) | view |
| 50 | x 2 | WEB/Src/PerformanceColle...mplementation/XPlatformWEB/Src/PerformanceColle...AppPerformanceCollector | PerformanceCollectorXPlatform.csWebAppPerformanceCollector.cs |
11:126 (50%)11:126 (48%) | view |
| 40 | x 2 | BASE/src/Microsoft.Appli...sibility/ImplementationBASE/src/ServerTelemetryChannel/Implementation | TaskTimerInternal.csTaskTimerInternal.cs |
1:116 (81%)1:117 (81%) | view |
| 38 | x 2 | WEB/Src/PerformanceColle...tract/TelemetryDocumentWEB/Src/PerformanceColle...tract/TelemetryDocument | DependencyTelemetryDocument.csDependencyTelemetryDocument.cs |
1:61 (86%)1:62 (84%) | view |
| 32 | x 2 | WEB/Src/PerformanceColle...tract/TelemetryDocumentWEB/Src/PerformanceColle...tract/TelemetryDocument | RequestTelemetryDocument.csRequestTelemetryDocument.cs |
1:52 (84%)1:53 (82%) | view |
| 30 | x 2 | NETCORE/src/Microsoft.Ap...isteners/ImplementationWEB/Src/Common | PropertyFetcher.csPropertyFetcher.cs |
11:93 (96%)11:85 (93%) | view |
| 28 | x 2 | BASE/src/Microsoft.Appli...sibility/ImplementationBASE/src/Microsoft.Appli...sibility/Implementation | RichPayloadEventSource.TelemetryHandl...RichPayloadEventSource.TelemetryHandl... |
525:560 (4%)698:733 (4%) | view |
| 28 | x 2 | WEB/Src/DependencyCollec...on/SqlClientDiagnosticsWEB/Src/DependencyCollec...on/SqlClientDiagnostics | SqlClientDiagnosticSourceListener.csSqlClientDiagnosticSourceListener.cs |
635:673 (5%)678:717 (5%) | view |
| 28 | x 2 | WEB/Src/PerformanceColle...tract/TelemetryDocumentWEB/Src/PerformanceColle...tract/TelemetryDocument | ExceptionTelemetryDocument.csExceptionTelemetryDocument.cs |
1:46 (82%)1:47 (80%) | view |
| 27 | x 2 | BASE/src/Microsoft.Appli...sibility/ImplementationBASE/src/ServerTelemetryChannel/Implementation | XorshiftRandomBatchGenerator.csXorshiftRandomBatchGenerator.cs |
9:71 (96%)9:71 (96%) | view |
| 25 | x 2 | WEB/Src/PerformanceColle...plementation/QuickPulseWEB/Src/PerformanceColle...plementation/QuickPulse | QuickPulseServiceClient.csQuickPulseServiceClient.cs |
272:309 (11%)275:312 (10%) | view |
| 25 | x 2 | BASE/src/Microsoft.Appli...lectedMetricsExtractionWEB/Src/WindowsServer/WindowsServer/Implementation | MetricTerms.csMetricManager.cs |
5:59 (43%)47:101 (3%) | view |
| 25 | x 2 | WEB/Src/PerformanceColle...plementation/QuickPulseWEB/Src/PerformanceColle...plementation/QuickPulse | QuickPulseServiceClient.csQuickPulseServiceClient.cs |
311:355 (11%)314:358 (10%) | view |
Duplicated Units
The list of top 20 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 36 | x 2 | BASE/src/Microsoft.Appli...sibility/ImplementationBASE/src/ServerTelemetryChannel/Implementation | WeakConcurrentRandom.csWeakConcurrentRandom.cs |
105:171 99:165 | view |
| 28 | x 2 | BASE/src/Microsoft.ApplicationInsights/MetricsBASE/src/Microsoft.ApplicationInsights/Metrics | MetricSeries.csMetricSeries.cs |
121:154 163:196 | view |
| 26 | x 2 | WEB/Src/PerformanceColle...plementation/QuickPulseWEB/Src/PerformanceColle...plementation/QuickPulse | QuickPulseServiceClient.csQuickPulseServiceClient.cs |
50:77 55:82 | view |
| 26 | x 2 | WEB/Src/PerformanceColle...mplementation/XPlatformWEB/Src/PerformanceColle...AppPerformanceCollector | PerformanceCollectorXPlatform.csWebAppPerformanceCollector.cs |
69:97 69:97 | view |
| 25 | x 2 | BASE/src/Microsoft.Appli...sibility/ImplementationBASE/src/ServerTelemetryChannel/Implementation | TaskTimerInternal.csTaskTimerInternal.cs |
58:88 59:89 | view |
| 25 | x 2 | WEB/Src/DependencyCollec...on/SqlClientDiagnosticsWEB/Src/DependencyCollec...on/SqlClientDiagnostics | SqlClientDiagnosticSourceListener.csSqlClientDiagnosticSourceListener.cs |
598:632 784:818 | view |
| 23 | x 2 | WEB/Src/PerformanceColle...plementation/QuickPulseWEB/Src/PerformanceColle...plementation/QuickPulse | QuickPulseServiceClient.csQuickPulseServiceClient.cs |
85:109 90:114 | view |
| 23 | x 2 | WEB/Src/PerformanceColle...plementation/QuickPulseWEB/Src/PerformanceColle...plementation/QuickPulse | QuickPulseServiceClient.csQuickPulseServiceClient.cs |
111:135 116:140 | view |
| 21 | x 2 | WEB/Src/PerformanceColle...plementation/QuickPulseWEB/Src/PerformanceColle...plementation/QuickPulse | QuickPulseServiceClient.csQuickPulseServiceClient.cs |
326:351 329:354 | view |
| 19 | x 2 | BASE/src/Microsoft.Appli...sibility/ImplementationBASE/src/ServerTelemetryChannel/Implementation | XorshiftRandomBatchGenerator.csXorshiftRandomBatchGenerator.cs |
50:72 50:72 | view |
| 18 | x 2 | BASE/src/Microsoft.Appli...sibility/ImplementationBASE/src/Microsoft.Appli...sibility/Implementation | DictionarySerializationWriter.csDictionarySerializationWriter.cs |
44:64 66:86 | view |
| 17 | x 2 | LOGGING/src/ILoggerNETCORE/src/Microsoft.Ap.../Logging/Implementation | ApplicationInsightsLogger.csApplicationInsightsLogger.cs |
130:147 92:109 | view |
| 17 | x 2 | WEB/Src/CommonWEB/Src/Common | ApplicationInsightsActivity.csApplicationInsightsActivity.cs |
30:54 60:84 | view |
| 17 | x 2 | WEB/Src/DependencyCollec...lementation/HttpParsersWEB/Src/DependencyCollec...lementation/HttpParsers | AzureSearchHttpParser.csDocumentDbHttpParser.cs |
174:191 148:166 | view |
| 15 | x 2 | BASE/src/Microsoft.Appli...sibility/ImplementationBASE/src/ServerTelemetryChannel/Implementation | WeakConcurrentRandom.csWeakConcurrentRandom.cs |
198:216 192:210 | view |
| 15 | x 2 | NETCORE/src/Microsoft.Ap...isteners/ImplementationWEB/Src/Common | HeadersUtilities.csHeadersUtilities.cs |
21:37 24:40 | view |
| 14 | x 2 | WEB/Src/PerformanceColle...mplementation/XPlatformWEB/Src/PerformanceColle...ardPerformanceCollector | PerformanceCollectorXPlatform.csStandardPerformanceCollector.cs |
121:136 137:152 | view |
| 13 | x 2 | BASE/src/Microsoft.ApplicationInsights/MetricsBASE/src/Microsoft.ApplicationInsights/Metrics | MetricSeries.csMetricSeries.cs |
304:317 319:332 | view |
| 12 | x 2 | BASE/src/Microsoft.Appli...sibility/ImplementationBASE/src/Microsoft.Appli...sibility/Implementation | JsonSerializationWriter.csJsonSerializationWriter.cs |
163:176 179:192 | view |
| 12 | x 2 | BASE/src/Microsoft.Appli...sibility/ImplementationWEB/Src/WindowsServer/WindowsServer/Implementation | SnapshottingCollection.csMetricManager.cs |
89:102 748:761 | view |