22 Jul
2014
22 Jul
'14
6:26 p.m.
On Tue, Jul 22, 2014 at 12:03 PM, Tudor Girba <tudor(a)tudorgirba.com> wrote:
Hi,
I am preparing a talk on software environmentalism (
http://www.tudorgirba.com/blog/keynote-at-ecoop-2014) and I am looking
for resources around the following issues:
- the amount of source code in the world
This is not the total amount of source code in the works, but it is a quite
huge number:
IDC estimates there are more than 10,000 large IBM mainframe sites
worldwide with 200 billion lines of legacy code still in use [2].
[2] Len Erlikh. Leveraging Legacy System Dollars for E-Business. IT
Professional, vol. 2, no. 3, pages 17–23, 2000. 2
- the amount of time spent on reading code
Corbi estimates the portion of time invested in program comprehension to be
between 50 and 60% [1].
[1] Thomas A. Corbi. Program Understanding: Challenge for the 1990’s. IBM
Systems Journal, vol. 28, no. 2, pages 294–306, 1989. 2
- the development tools in use
- how people use custom tools (for example, unix/linux scripts)
- or other similar ones
Up to 90% of the total cost of software development project is spent in
maintenance and evolution [2,3].
[3] Alan Mark Davis. 201 principles of software development. McGraw-Hill,
1995. 2
Do you happen to know any pointers that go in this direction?
Cheers,
Doru
--
www.tudorgirba.com
"Every thing has its own flow"
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