Code as a Crime Scene @AdamTornhill Understanding Code - PowerPoint PPT Presentation

Treat Your Code as a Crime Scene @AdamTornhill

Understanding Code

@AdamTornhill

Cyclomatic Complexity @AdamTornhill

“Syntactic complexity metrics cannot capture the whole picture of software complexity” (Herraiz & Hassan) “The use of metrics to manage software projects has not even reached a state of infancy” (Glass) @AdamTornhill

Intuition Doesn’t Scale

Forensic Psychology

g n i l fi o r P r e d n e f f O l a c i h p a r g o e G - n o i t c u d o r t n I s e t u n i M 2 a

Profiling the Ripper

How can we use this in Code ?

A geography of code @AdamTornhill Code City, http://www.inf.usi.ch/phd/wettel/codecity.html

Spatial Movement in Code When? Who? [0a05fba] Adam Tornhill 2013-09-17 Added an identity analysis as debug aid 
 5 1 README.md 
 5 5 src/code_maat/analysis/authors.clj 
 3 4 src/code_maat/app/app.clj 
 1 1 src/code_maat/core.clj 
 18 1 test/code_maat/end_to_end/scenario_tests.clj Where! @AdamTornhill

Geographical profiling of Code @AdamTornhill

Geographical profiling of Code Hotspot @AdamTornhill

A Case Study

Hotspot Hotspot @AdamTornhill

Hotspots and Defects 7 out of 8 most defect dense parts 4 % of the Code , 72 % of all defects !

Improve 4 % of your code , get rid of most defects @AdamTornhill

Evolution of a Program Time

Complexity Trend method-to-ir.c Complexity 2010 Time 2014

Software

e ? i L e Doesn’t d o C

Temporal Coupling Commit #1 Commit #2 Commit #3 FuelInjector.cs Diagnostics.cs Combustion.cs Time @AdamTornhill

Physical coupling Logical coupling ? @AdamTornhill

Temporal Coupling @AdamTornhill

Conway’s Law Legacy Code ? and

@AdamTornhill

A Perfect World Team #1 Team #2 Team #3 @AdamTornhill

Team #2 Team #1 Team #4 Team #3 @AdamTornhill

Team #1 Team #2 Team #4 Team #3 @AdamTornhill

Align Your Architecture and Organisation

y t i l a u Q Number of Programmers @AdamTornhill

Fractal Figures @AdamTornhill Idea from: Fractal Figures: Visualizing Development Effort for CVS Entities (D’Ambros, Lanza, & Gall)

Identify Main developers Main Developer “Knowledge Owner” @AdamTornhill

Your map as a Guide

Team #1 Team #2 Team #3 @AdamTornhill

The Pareto Principle

Loss of Knowledge @AdamTornhill

Abandoned subsystem @AdamTornhill

Code <3 Forensics @AdamTornhill

Read More www.adamtornhill.com/articles/aspnetclones/killtheclones.html www.adamtornhill.com/articles/socialside/socialsideofcode.htm The Tools as a Service (work in progress) https://codescene.io/ @AdamTornhill adam@adamtornhill.com