Initial patch by Yuriy Senko.

#6696: add documentation for the Profile objects, and improve profile/cProfile docs.  Patch by Tom Pinckney.

  compiler.

Patch by Todd Rovito.

  files when imported, instead doing it at build time.  This makes importing
  sysconfig faster and reduces Python startup time by 20%.

Patch contributed by Bohuslav "Slavek" Kabrda (bkabrda)

This means we can remove our usage of qsort() than relied on undefined behavior.

Backport by Zbigniew Halas.

in itertools module (i.e. itertools.izip(), itertools.chain(), etc).