jemalloc 4.1.0发布，增强了可移植性

jemalloc 4.1.0 发布了新的版本，增强了可移植性，性能也得以大大的优化。

jemalloc 4.1.0新特性：

* Implement decay-based unused dirty page purging, a major optimization with mallctl API impact. This is an alternative to the existing ratio-based unused dirty page purging, and is intended to eventually become the sole purging mechanism. New mallctls:

 opt.purge
 opt.decay_time
 arena.<i>.decay
 arena.<i>.decay_time
 arenas.decay_time
 stats.arenas.<i>.decay_time

(@jasone, @cevans87)

* Add --with-malloc-conf, which makes it possible to embed a default options string during configuration. This was motivated by the desire to specify --with-malloc-conf=purge:decay , since the default must remain purge:ratio until the 5.0.0 release. (@jasone)
* Add MS Visual Studio 2015 support. (@rustyx, @yuslepukhin)
* Make *allocx() size class overflow behavior defined. The maximum size class is now less than PTRDIFF_MAX to protect applications against numerical overflow, and all allocation functions are guaranteed to indicate errors rather than potentially crashing if the request size exceeds the maximum size class. (@jasone)
* jeprof:
 Add raw heap profile support. (@jasone)
 Add --retain and --exclude for backtrace symbol filtering. (@jasone)

关于该版本的更多详情，可参见 https://github.com/jemalloc/jemalloc/releases/tag/4.1.0

下载地址：https://github.com/jemalloc/jemalloc/releases/download/4.1.0/jemalloc-4.1.0.tar.bz2