这个工具可让开发创建更强大的应用程序，特别是那些用C++模版开发的多线程应用程序，包括TCMalloc, heap-checker, heap-profiler 和cpu-profiler。
Gperftools 2.1正式版发布。2013-07-30经过1个RC.其中主要TcMalloc内存管理库，与标准glibc库malloc相比，TcMalloc在内 存分配效率和速度上要高很多，可提升高并发情况下性能，降低系统负载，常用于Nginx优化等。上个版本还是2012-02-03的2.0。
改进说明：== 30 July 2013 ==
gperftools 2.1 is out!
Just few fixes where merged after rc. Most notably:
* Some fixes for debug allocation on POWER/Linux
== 20 July 2013 ==
gperftools 2.1rc is out!
As a result of more than a year of contributions we're ready for 2.1
release.
But before making that step I'd like to create RC and make sure people
have chance to test it.
Here are notable changes since 2.0:
* fixes for building on newer platforms. Notably, there's now initial
support for x32 ABI (--enable-minimal only at this time))
* new getNumericProperty stats for cache sizes
* added HEAP_PROFILER_TIME_INTERVAL variable (see documentation)
* added environment variable to control heap size (TCMALLOC_HEAP_LIMIT_MB)
* added environment variable to disable release of memory back to OS
(TCMALLOC_DISABLE_MEMORY_RELEASE)
* cpu profiler can now be switched on and off by sending it a signal
(specified in CPUPROFILESIGNAL)
* (issue 491) fixed race-ful spinlock wake-ups
* (issue 496) added some support for fork-ing of process that is using
tcmalloc
* (issue 368) improved memory fragmentation when large chunks of
memory are allocated/freed
下载：http://gperftools.googlecode.com/files/gperftools-2.1.tar.gz
来自:开源中国社区
