testArithmeticalConvexhull enters an infinite loop

[dcoeurjo]

for some specific build configurations only..

see eg. #949

[isivigno]

May be related to the changes made in #950: @troussil could you have a look at it ?

[rolanddenis]

For my last PR, I've launch all the tests and they all passed, even the testArithmeticalDSSConvexHull but it was very long, 470s on my computer. It is maybe not an infinite loop ?
In addition, only the travis builds that use gcc failed on this test, but when clang is used, it passed (this test).

I did some tests and here are the corresponding time for this test:

• g++ (4.9.2), Debug: 470s,
• g++, Release: 29s,
• clang++ (3.5.0), Debug: 35s,
• clang++, Release: 27s.

There seems to be a huge slowdown of this test in debug mode with gcc...

[troussil]

Thank you @rolanddenis. You're right.

testArithmeticalDSSConvexHull runs in 10 minutes on my computer. @isivigno, you should remove the following line:
https://github.com/isivigno/DGtal/blob/cd73975c50b805ae9b53205c7548cceff4b9649a/tests/geometry/curves/testArithmeticalDSSConvexHull.cpp#L429
because the added loop is too costly.
Without it, the whole test runs in 10 seconds.

PS. g++ (4.8.2), Debug

[dcoeurjo]

Seems to be solved.. closing