Release 6.09/02 - 2017-03-08


This is the first ROOT development release of the 6.09 series! It is meant to offer a preview of the many features which will be included in the 6.10 production release.

Some highlights:

  • Automatic colouring of plots. How? Check this out here.
  • The TDataFrame framework landed in ROOT: it is possible to analyse data contained in ROOT trees in a functional manner taking advantage transparently of all cores of your machine
  • More building blocks for expressing parallelism: check out our TThreadExecutor class!
  • More parallelism behind the scenes, for example parallel compression when writing to a TTree. Just let ROOT run your code in parallel: invoke ROOT::EnableImplicitMT()
  • A faster ROOT: for example lots of symbols are now hidden, TMethodCall is now twice as fast as before.
  • ClassDefInline(MyClass, 3) adds ClassDef functionality without the need to generate a dictionary, which is especially useful for scripts and other non-framework code.

Source distribution

Platform Files Size
source root_v6.09.02.source.tar.gz 150M

Binary distributions

Platform Files Size
CentOS Cern 7 gcc4.8 root_v6.09.02.Linux-centos7-x86_64-gcc4.8.tar.gz 143M
Linux fedora22 gcc5.3 root_v6.09.02.Linux-fedora22-x86_64-gcc5.3.tar.gz 130M
Linux fedora24 gcc6.1 root_v6.09.02.Linux-fedora24-x86_64-gcc6.1.tar.gz 110M
Ubuntu 14 gcc4.8 root_v6.09.02.Linux-ubuntu14-x86_64-gcc4.8.tar.gz 129M
Ubuntu 16 gcc5.4 root_v6.09.02.Linux-ubuntu16-x86_64-gcc5.4.tar.gz 130M
OsX 10.10 clang70 root_v6.09.02.macosx64-10.10-clang70.dmg 113M
OsX 10.10 clang70 root_v6.09.02.macosx64-10.10-clang70.tar.gz 114M
OsX 10.11 clang80 root_v6.09.02.macosx64-10.11-clang80.dmg 118M
OsX 10.11 clang80 root_v6.09.02.macosx64-10.11-clang80.tar.gz 118M
OsX 10.12 clang80 root_v6.09.02.macosx64-10.12-clang80.dmg 125M
OsX 10.12 clang80 root_v6.09.02.macosx64-10.12-clang80.tar.gz 125M

Installations in CVMFS

Standalone installations with minimal external dependencies are available at:


Example for setting up ROOT and the corresponding compiler from CVMFS

From a centos7 node, for example lxplus7:

. /cvmfs/


The entire ROOT source can be obtained from our public Git repository:

git clone

The release specific tag can be obtained using:

cd root
git checkout -b v6-09-02 v6-09-02