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?

まず、issue の GitHub Gist にリンクされている再現手順を実行し、コミットと diff を反復処理する間のメモリを観察します。Stack Overflow のディスカッションと動作を比較し、リークがコミットの反復処理にあるのか diff の処理にあるのかを特定します。増加を再現し、検証済みの修正または文書化された代替手段を確立できれば完了です。