Most of the infrastructure that 'perf' uses here has been reused
from the Git project, as of version:

    66996ec: Sync with 1.6.2.4

Here is an (incomplete!) list of main contributors to those files
in util/* and elsewhere:

 Alex Riesen
 Christian Couder
 Dmitry Potapov
 Jeff King
 Johannes Schindelin
 Johannes Sixt
 Junio C Hamano
 Linus Torvalds
 Matthias Kestenholz
 Michal Ostrowski
 Miklos Vajna
 Petr Baudis
 Pierre Habouzit
 René Scharfe
 Samuel Tardieu
 Shawn O. Pearce
 Steffen Prohaska
 Steve Haslam

Thanks guys!

The full history of the files can be found in the upstream Git commits.
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