Leak when iterating through commits and diff them

When I run the code below on a production repository, i can see that the memory is all the time increasing and after about 3000 commits my pc crashes with out of memory.

For about 1000 commit it reserved about 500 MB Ram.

Code for Testsetup see here:
https://gist.github.com/Gentlehag/9f595ab13f459e22859fa5d9557e550b

PS: I also posted here:
http://stackoverflow.com/questions/39258639/possible-leak-when-reading-content

My target is to just iterate through all commits and getting all files that were changed in eahc commit.

Is there a better way ? Is this a bug?

Comienza ejecutando la reproducción enlazada en el GitHub Gist del issue y observa la memoria mientras recorres los commits y los diffs. Compara el comportamiento con la discusión de Stack Overflow y, a continuación, identifica si la fuga está en la iteración de commits o en el manejo de diffs; se considera terminado cuando se haya reproducido el crecimiento y establecido una solución verificada o una alternativa documentada.