Major changes:

• Performance improvements; CPU overhead of allocation-heavy heavily multithreaded programs was cut down by up to ~80%
• You can now control whether child processes are profiled with the MEMORY_PROFILER_TRACK_CHILD_PROCESSES environment variable (disabled by default)
• The fragmentation timeline was removed from the UI
• mmap/munmap calls are now gathered by default (you can disable this with MEMORY_PROFILER_GATHER_MAPS)
• Total actual memory usage is now gathered by periodically polling /proc/self/smaps
• Maps can now be browsed in the UI and analyzed through the scripting API
• Maps are now named according to their source using PR_SET_VMA_ANON_NAME (Linux 5.17 or newer; on older kernels this is emulated in user space)
• Glibc-internal __mmap and __munmap are now hooked into
• Bytehound-internal allocations now exclusively use mimalloc as their allocator
• New scripting APIs:
  • AllocationList::only_alive_at
  • AllocationList::only_from_maps
  • Graph::start_at
  • Graph::end_at
  • Graph::show_address_space
  • Graph::show_rss
  • MapList
  • Map
• Removed scripting APIs:
  • AllocationList::only_not_deallocated_after_at_least
  • AllocationList::only_not_deallocated_until_at_most
  • Graph::truncate_until
  • Graph::extend_until
• Removed lifetime filters in the UI: only_not_deallocated_in_current_range, only_deallocated_in_current_range
• Fixed a rare crash when profiling programs using jemalloc
• Added support for aligned_alloc
• Added support for memalign
• Relative scale in the generated graphs is now always relative to the start of profiling
• Gathered backtraces will now include an extra Bytehound-specific frame on the bottom to indicate which function was called
• Minor improvements to the UI