2016/7/27 にこんなアップデートがあったようです。 Changelog - We've added the option to auto-cancel redundant builds. Read more, and how to enable it, here: https://t.co/MTjOV7ttkF— CircleCI (@circleci) July 26, 2016 Project Settings → Advanced Settings に設定項目があります。 With the exception of your default branch, we will automatically cancel any queued or running builds on a branch when a newer build is triggered on that s
![CircleCIの"Auto-cancel redundant builds"を有効にするとPRごとの冗長なCIをキャンセルできる - Islands in the byte stream](https://cdn-ak-scissors.b.st-hatena.com/image/square/cbef55831d24f28989a2ff7ad0f3d713068b24a5/height=288;version=1;width=512/https%3A%2F%2Fcdn-ak.f.st-hatena.com%2Fimages%2Ffotolife%2Fg%2Fgfx%2F20160904%2F20160904155004.png)