ea5b7bea31
In many environments, the fallback `sbrk(2)` allocation path is never used even if the system supports the syscall; if you're at the point where `mmap(2)` is failing, `sbrk(2)` is unlikely to succeed. Without changing the default, I've added the ability to disable the usage of DSS altogether, so that you do not need to pay for the additional code size and handful of extra runtime branches in such environments.
jemalloc is a general purpose malloc(3) implementation that emphasizes fragmentation avoidance and scalable concurrency support. jemalloc first came into use as the FreeBSD libc allocator in 2005, and since then it has found its way into numerous applications that rely on its predictable behavior. In 2010 jemalloc development efforts broadened to include developer support features such as heap profiling and extensive monitoring/tuning hooks. Modern jemalloc releases continue to be integrated back into FreeBSD, and therefore versatility remains critical. Ongoing development efforts trend toward making jemalloc among the best allocators for a broad range of demanding applications, and eliminating/mitigating weaknesses that have practical repercussions for real world applications. The COPYING file contains copyright and licensing information. The INSTALL file contains information on how to configure, build, and install jemalloc. The ChangeLog file contains a brief summary of changes for each release. URL: https://jemalloc.net/