Are you using Bitbucket Branch Source?

[Stephen Connolly]

I have released 2.1.1-beta-1 into the experimental update center. This version has the super-awesome scoped event support. This should give very responsive branch creation directly after the commit creating the branch has been pushed.

I plan to release 2.1.1 some time tomorrow.

If you are using the Bitbucket Branch Source and can provide assistance by testing the 2.1.1-beta-1 release, please report any issues you have in the https://issues.jenkins-ci.org/browse/JENKINS-41816 ticket 

[Peter Hayes]

I just tried it out on a repo with 25 branches and I could see that the one branch I pushed to, it immediately started a build for that branch and then continued to check the other branches.  I then pushed one of the other branches and it picked that up first and then continued to check the remaining branches so I definitely see improvement in the time it takes to kick the branch build.  Thanks!