facebookincubator / OnlineSchemaChange
Duplication

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.
Learn more...
Duplication Overall
  • 5% duplication:
    • 6,726 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
    • 399 duplicated lines
  • 42 duplicates
system5% (399 lines)
Duplication per Extension
py5% (399 lines)
Duplication per Component (primary)
core/lib/payload6% (158 lines)
core/lib8% (124 lines)
core/lib/sqlparse4% (105 lines)
core/commands2% (12 lines)
core0% (0 lines)
ROOT0% (0 lines)
Longest Duplicates
The list of 42 longest duplicates.
See data for all 42 duplicates...
Size#FoldersFilesLinesCode
15 x 2 core/lib
core/lib
 673:692 (2%)
730:744 (2%)
 view
11 x 2 core/lib
core/lib
 716:726 (1%)
758:768 (1%)
 view
10 x 2 core/lib/payload
core/lib/payload
 2331:2340 (<1%)
2415:2424 (<1%)
 view
9 x 2 core/lib/payload
core/lib/payload
 2973:2981 (<1%)
44:52 (37%)
 view
9 x 2 core/lib/payload
core/lib/payload
 1915:1924 (<1%)
1934:1943 (<1%)
 view
9 x 2 core/lib/sqlparse
core/lib/sqlparse
 445:454 (1%)
490:499 (1%)
 view
9 x 2 core/lib/payload
core/lib/payload
 2297:2305 (<1%)
2401:2409 (<1%)
 view
8 x 2 core/lib/payload
core/lib/payload
 2948:2955 (<1%)
36:43 (33%)
 view
8 x 2 core/lib
core/lib
 662:669 (1%)
761:768 (1%)
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8 x 2 core/lib
core/lib
 662:669 (1%)
719:726 (1%)
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7 x 2 core/lib
core/lib/sqlparse
 121:127 (7%)
821:827 (1%)
 view
7 x 2 core/lib
core/lib/sqlparse
 105:111 (7%)
821:827 (1%)
 view
7 x 2 core/lib
core/lib
 105:111 (7%)
137:143 (7%)
 view
7 x 2 core/lib
core/lib
 89:95 (7%)
137:143 (7%)
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7 x 2 core/lib
core/lib/sqlparse
 89:95 (7%)
821:827 (1%)
 view
7 x 2 core/lib
core/lib
 89:95 (7%)
121:127 (7%)
 view
7 x 2 core/lib
core/lib/sqlparse
 137:143 (7%)
821:827 (1%)
 view
7 x 2 core/lib/sqlparse
core/lib/sqlparse
 789:795 (<1%)
827:833 (<1%)
 view
7 x 2 core/lib/payload
core/lib/payload
 208:214 (3%)
235:241 (3%)
 view
7 x 2 core/lib
core/lib
 105:111 (7%)
121:127 (7%)
 view
7 x 2 core/lib
core/lib
 89:95 (7%)
105:111 (7%)
 view
7 x 2 core/lib
core/lib
 121:127 (7%)
137:143 (7%)
 view
6 x 2 core/lib
core/lib/payload
 137:142 (6%)
512:517 (<1%)
 view
6 x 2 core/lib/sqlparse
core/lib/sqlparse
 400:405 (1%)
490:495 (1%)
 view
6 x 2 core/lib/payload
core/lib/sqlparse
 512:517 (<1%)
821:826 (1%)
 view
6 x 2 core/lib
core/lib/payload
 105:110 (6%)
512:517 (<1%)
 view
6 x 2 core/lib/sqlparse
core/lib/sqlparse
 557:562 (<1%)
580:585 (<1%)
 view
6 x 2 core/lib/payload
core/lib/payload
 798:804 (<1%)
954:959 (<1%)
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6 x 2 core/lib
core/lib/payload
 121:126 (6%)
512:517 (<1%)
 view
6 x 2 core/lib/sqlparse
core/lib/sqlparse
 400:405 (1%)
445:450 (1%)
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6 x 2 core/commands
core/commands
 36:41 (17%)
49:54 (12%)
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6 x 2 core/lib/sqlparse
core/lib/sqlparse
 728:733 (<1%)
771:776 (<1%)
 view
6 x 2 core/lib
core/lib
 487:492 (<1%)
535:540 (<1%)
 view
6 x 2 core/lib/sqlparse
core/lib/sqlparse
 299:304 (1%)
394:399 (1%)
 view
6 x 2 core/lib/payload
core/lib/payload
 2474:2479 (<1%)
2485:2490 (<1%)
 view
6 x 2 core/lib/sqlparse
core/lib/sqlparse
 436:442 (1%)
477:483 (1%)
 view
6 x 2 core/lib/payload
core/lib/payload
 219:224 (3%)
246:251 (3%)
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6 x 2 core/lib/sqlparse
core/lib/sqlparse
 112:119 (1%)
385:392 (1%)
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6 x 2 core/lib
core/lib
 82:87 (6%)
114:119 (6%)
 view
6 x 2 core/lib
core/lib/payload
 89:94 (6%)
512:517 (<1%)
 view
6 x 2 core/lib
core/lib
 98:103 (6%)
130:135 (6%)
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6 x 2 core/lib/payload
core/lib/payload
 1655:1661 (<1%)
1679:1685 (<1%)
 view