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An Empirical Study Of Function Clones In Open Source Software

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This a presentation on a Research paper basically they made a tool call NICAD.

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An Empirical Study of Function Clones in Open Source Software Chnchal K.Roy and James R. Cordy Queen’s University Presenter: MF Khan
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Introduction (Cont) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
NICAD Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
NICAD Overview ,[object Object],[object Object],[object Object],[object Object],[object Object]
Experimental Setup ,[object Object],[object Object]
Experimental Setup ,[object Object]
Clone Definition ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Validation of Clones ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Metrics and Visualizations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Metrics and Visualizations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Experimental Results 1.More function cloning in Open Source java than in C. On AvG about 15%(7.2% wrt LOC) 2.Effect of increasing UPI is almost identical.
Detail Overview 1.Several of C system have <10% cloning function. Java systems are consistent in cloning
Clone Associated Files
Clone Associated Files ,[object Object],[object Object]
Profiles of Cloning Density ,[object Object],That’s mean Scattered File and more near miss clones
Profile of cloning Density Assuming that cloned method in high density cloned file have been intentionally copy/Pasted.
Profile Cloning Localization Location of a clone pair is a factor in s/w maintenance Except Linux there are no exact clone in (UPI threshold 0.0) in C When UPI threshold is 0.3,On average 45.9 %(49.0 % LOC) of clone pair in C Occur.
Conclusion ,[object Object],[object Object],[object Object]
Discussion ,[object Object],[object Object],[object Object],[object Object],[object Object]
Thank you.

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An Empirical Study Of Function Clones In Open Source Software

  • 1. An Empirical Study of Function Clones in Open Source Software Chnchal K.Roy and James R. Cordy Queen’s University Presenter: MF Khan
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9.
  • 10.
  • 11.
  • 12.
  • 13. Experimental Results 1.More function cloning in Open Source java than in C. On AvG about 15%(7.2% wrt LOC) 2.Effect of increasing UPI is almost identical.
  • 14. Detail Overview 1.Several of C system have <10% cloning function. Java systems are consistent in cloning
  • 16.
  • 17.
  • 18. Profile of cloning Density Assuming that cloned method in high density cloned file have been intentionally copy/Pasted.
  • 19. Profile Cloning Localization Location of a clone pair is a factor in s/w maintenance Except Linux there are no exact clone in (UPI threshold 0.0) in C When UPI threshold is 0.3,On average 45.9 %(49.0 % LOC) of clone pair in C Occur.
  • 20.
  • 21.