6a7,50
> * 4.2.0 (May 12, 2016)
>
> New features:
> - Add the arena.<i>.reset mallctl, which makes it possible to discard all of
> an arena's allocations in a single operation. (@jasone)
> - Add the stats.retained and stats.arenas.<i>.retained statistics. (@jasone)
> - Add the --with-version configure option. (@jasone)
> - Support --with-lg-page values larger than actual page size. (@jasone)
>
> Optimizations:
> - Use pairing heaps rather than red-black trees for various hot data
> structures. (@djwatson, @jasone)
> - Streamline fast paths of rtree operations. (@jasone)
> - Optimize the fast paths of calloc() and [m,d,sd]allocx(). (@jasone)
> - Decommit unused virtual memory if the OS does not overcommit. (@jasone)
> - Specify MAP_NORESERVE on Linux if [heuristic] overcommit is active, in order
> to avoid unfortunate interactions during fork(2). (@jasone)
>
> Bug fixes:
> - Fix chunk accounting related to triggering gdump profiles. (@jasone)
> - Link against librt for clock_gettime(2) if glibc < 2.17. (@jasone)
> - Scale leak report summary according to sampling probability. (@jasone)
>
> * 4.1.1 (May 3, 2016)
>
> This bugfix release resolves a variety of mostly minor issues, though the
> bitmap fix is critical for 64-bit Windows.
>
> Bug fixes:
> - Fix the linear scan version of bitmap_sfu() to shift by the proper amount
> even when sizeof(long) is not the same as sizeof(void *), as on 64-bit
> Windows. (@jasone)
> - Fix hashing functions to avoid unaligned memory accesses (and resulting
> crashes). This is relevant at least to some ARM-based platforms.
> (@rkmisra)
> - Fix fork()-related lock rank ordering reversals. These reversals were
> unlikely to cause deadlocks in practice except when heap profiling was
> enabled and active. (@jasone)
> - Fix various chunk leaks in OOM code paths. (@jasone)
> - Fix malloc_stats_print() to print opt.narenas correctly. (@jasone)
> - Fix MSVC-specific build/test issues. (@rustyx, @yuslepukhin)
> - Fix a variety of test failures that were due to test fragility rather than
> core bugs. (@jasone)
>
62c106
< (@jasone, Christopher Ferris)
---
> (@jasone, @cferris1000)
69c113
< - Fix a potential tsd cleanup leak. (Christopher Ferris, @jasone)
---
> - Fix a potential tsd cleanup leak. (@cferris1000, @jasone)
> * 4.2.0 (May 12, 2016)
>
> New features:
> - Add the arena.<i>.reset mallctl, which makes it possible to discard all of
> an arena's allocations in a single operation. (@jasone)
> - Add the stats.retained and stats.arenas.<i>.retained statistics. (@jasone)
> - Add the --with-version configure option. (@jasone)
> - Support --with-lg-page values larger than actual page size. (@jasone)
>
> Optimizations:
> - Use pairing heaps rather than red-black trees for various hot data
> structures. (@djwatson, @jasone)
> - Streamline fast paths of rtree operations. (@jasone)
> - Optimize the fast paths of calloc() and [m,d,sd]allocx(). (@jasone)
> - Decommit unused virtual memory if the OS does not overcommit. (@jasone)
> - Specify MAP_NORESERVE on Linux if [heuristic] overcommit is active, in order
> to avoid unfortunate interactions during fork(2). (@jasone)
>
> Bug fixes:
> - Fix chunk accounting related to triggering gdump profiles. (@jasone)
> - Link against librt for clock_gettime(2) if glibc < 2.17. (@jasone)
> - Scale leak report summary according to sampling probability. (@jasone)
>
> * 4.1.1 (May 3, 2016)
>
> This bugfix release resolves a variety of mostly minor issues, though the
> bitmap fix is critical for 64-bit Windows.
>
> Bug fixes:
> - Fix the linear scan version of bitmap_sfu() to shift by the proper amount
> even when sizeof(long) is not the same as sizeof(void *), as on 64-bit
> Windows. (@jasone)
> - Fix hashing functions to avoid unaligned memory accesses (and resulting
> crashes). This is relevant at least to some ARM-based platforms.
> (@rkmisra)
> - Fix fork()-related lock rank ordering reversals. These reversals were
> unlikely to cause deadlocks in practice except when heap profiling was
> enabled and active. (@jasone)
> - Fix various chunk leaks in OOM code paths. (@jasone)
> - Fix malloc_stats_print() to print opt.narenas correctly. (@jasone)
> - Fix MSVC-specific build/test issues. (@rustyx, @yuslepukhin)
> - Fix a variety of test failures that were due to test fragility rather than
> core bugs. (@jasone)
>
62c106
< (@jasone, Christopher Ferris)
---
> (@jasone, @cferris1000)
69c113
< - Fix a potential tsd cleanup leak. (Christopher Ferris, @jasone)
---
> - Fix a potential tsd cleanup leak. (@cferris1000, @jasone)