A fresh IntelliJ IDEA 2016.2 EAP build is out and ready to test. Besides usual bugfixes it brings improvements to the Git/Mercurial Log viewer.
The Log viewer now loads in the background on every change (a commit, fetch, rebase, etc). As a result, it's always ready when you open it.
Also, we've reworked the way we show the loading progress. Now, when refreshing, there's a thin stripe shown u