Hi. I've just tagged gperftools 2.13.
Here is a list of changes from NEWS file.
* Ivan Dlugos has fixed some issues with cmake and config.h defines.
* 32-bit builds no longer require 64-bit atomics (which we wrongly introduced in 2.11 and which broke builds on some 32-bit architectures).
* generic_fp backtracing method now uses robust address probing method. The previous approach had occasional false positives, which caused occasional rare crashes.
* In some cases, MSVC generated TrivialOnce machine code that deadlocked programs on startup. The issue is now fixed.
Have a nice day!