[issue4074] Building a list of tuples has non-linear performance

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

This new patch adds another improvement where tuples can be "optimized".
Optimized means that tuples which don't contain any GC-tracked object
become themselves untracked. Since tuples are immutable this
optimization is valid, and since it is common to store lots of tuples as
very simple containers of atomic objects this can be an interesting
optimization.

Added file: http://bugs.python.org/file12378/gctrigger2.patch

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