1 Deprecated and Removed Features

    1.1 Earmuffed Vars are No Longer Automatically Considered Dynamic

    1.2 ISeq No Longer Inherits from Sequential

    1.3 Removed Bit Operation Support for Boxed Numbers

    1.4 Ancillary Namespaces No Longer Auto-Load on Startup

    1.5 Replicate Deprecated

 2 New/Improved Features

    2.1 Enhanced Primitive Support

    2.2 defrecord and deftype Improvements

    2.3 Better Exception Reporting

    2.4 clojure.reflect/reflect

    2.5 clojure.data/diff

    2.6 clojure.core/every-pred and clojure.core/some-fn Combinators

    2.7 clojure.core/realized?

    2.8 clojure.core/with-redefs-fn & with-redefs

    2.9 clojure.core/find-keyword

    2.10 clojure.repl/pst

    2.11 clojure.pprint/print-table

    2.12 pprint respects *print-length*

    2.13 compilation and deployment via Maven

    2.14 internal keyword map uses weak refs

    2.15 ^:const defs

    2.16 Message Bearing Assert

    2.17 Error Checking for defmulti Options

    2.18 Removed Checked Exceptions

    2.19 vector-of Takes Multiple Arguments

    2.20 deref with timeout

    2.21 Walk Support for sorted-by Collections

    2.22 string.join Enhanced to Work with Sets

    2.23 clojure.test-helper

    2.24 Newline outputs platform-specific newline sequence

    2.25 init-proxy and update-proxy return proxy

    2.26 doc & find-doc moved to REPL

    2.27 clojure.java.shell/sh accepts as input anything that clojure.java.io/copy does

    2.28 InterruptedHandler Promoted to clojure.repl

    2.29 Add support for running -main namespaces from clojure.main

    2.30 Set thread names on agent thread pools

    2.31 Add docstring support to def

    2.32 Comp function returns identity when called with zero arity

    2.33 Type hints can be applied to arg vectors

    2.34 Binding Conveyance

 3 Performance Enhancements

 4 Bug Fixes

 5 Modular Contrib