OS X 10.11.2 El Capitan beta 4 is now available to developers and public beta testers for download through the Mac App Store



From Techradar:

Apple did not provide details of specific changes in its latest release, likely focusing on under-the-hood tweaks to fix bugs, update security and improve performance. OS X 10.11.1 introduced issues that have been well documented in Apple's support forums, such as slow device performance, broken keychain access, freezes and problems with the Mail app. Hopefully, these issues will get resolved when OS X 10.11.2 is released to the public after successful beta testing.

  Latest OS X El Capitan beta strives to improve Mac performance