Update to the topic:

• I've setup up debug pipeline and was able to make a proper clean build and ensured GC plenty had plenty time to grab (snapshots every 30s)
• Only minor leaks are remaining
• I started looking at the allocations: on clean instance moving mouse/resizing window was expensive (see excerpt)
• Instance with uptime of 1 hour it has footprint of 405MiB (mind the debugging symbols though)

Best,
Przemysław Alexander Kamiński

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20.06 MB 99.0% 6421 start
20.06 MB 99.0% 6421 main
20.06 MB 99.0% 6421 Frecursive_edit
20.06 MB 99.0% 6421 recursive_edit_1
20.06 MB 99.0% 6421 command_loop
20.06 MB 99.0% 6421 command_loop.cold.1
20.06 MB 99.0% 6421 internal_catch
20.06 MB 99.0% 6421 command_loop_2
20.06 MB 99.0% 6421 internal_condition_case
20.06 MB 99.0% 6421 command_loop_1
20.04 MB 98.9% 6274 read_key_sequence
20.04 MB 98.9% 6273 read_char
19.24 MB 94.9% 588 read_decoded_event_from_main_queue
19.24 MB 94.9% 588 read_event_from_main_queue
19.24 MB 94.9% 587 kbd_buffer_get_event
19.24 MB 94.9% 587 wait_reading_process_output
11.11 MB 54.8% 584 ns_select_1
11.11 MB 54.8% 584 -[EmacsApp run]
11.11 MB 54.8% 584 -[NSApplication run]
11.09 MB 54.7% 558 -[NSApplication _handleEvent:]
11.09 MB 54.7% 558 -[EmacsApp sendEvent:]
11.09 MB 54.7% 558 -[NSApplication(NSEventRouting) sendEvent:]
11.09 MB 54.7% 558 -[NSWindow(NSEventRouting) sendEvent:]
11.09 MB 54.7% 558 -[NSWindow(NSEventRouting) _reallySendEvent:isDelayedEvent:]
11.09 MB 54.7% 558 -[NSWindow(NSEventRouting) _handleMouseDownEvent:isDelayedEvent:]
11.09 MB 54.7% 558 -[NSThemeFrame mouseDown:]
11.09 MB 54.7% 558 -[NSThemeFrame handleMouseDown:]
11.09 MB 54.7% 558 -[NSTitledFrame attemptResizeWithEvent:]
11.09 MB 54.7% 558 -[NSWindow(NSWindowResizing) _resizeWithEvent:]
11.07 MB 54.6% 416 -[NSApplication(NSEventRouting) _nextEventMatchingEventMask:untilDate:inMode:dequeue:]
7.66 KB 0.0% 88 -[NSWindow(NSWindowResizing) _frame:resizedFromEdge:withDelta:withEvent:withState:]
7.34 KB 0.0% 29 -[EmacsWindow setFrame:display:]
3.27 KB 0.0% 21 -[NSWindow _endLiveResize]
384 Bytes 0.0% 2 -[NSAutoreleasePool drain]
96 Bytes 0.0% 1 -[NSWindow(NSScreenLayout) _saveWindowLayoutForScreenLayout]
64 Bytes 0.0% 1 _objc_msgSend_uncached
19.36 KB 0.0% 26 -[NSApplication(NSEventRouting) _nextEventMatchingEventMask:untilDate:inMode:dequeue:]
8.13 MB 40.0% 3 detect_input_pending_run_timers
8.13 MB 40.0% 3 flush_frame
8.13 MB 40.0% 3 ns_flush_display
8.13 MB 40.0% 3 ns_read_socket_1
8.13 MB 40.0% 3 -[EmacsApp run]
8.13 MB 40.0% 3 -[NSApplication run]
8.13 MB 40.0% 3 -[NSApplication _handleEvent:]
8.13 MB 40.0% 3 -[EmacsApp sendEvent:]
8.13 MB 40.0% 3 -[NSApplication(NSEventRouting) sendEvent:]
8.13 MB 40.0% 3 routeMouseMovedEvent
8.13 MB 40.0% 3 -[NSWindow(NSEventRouting) sendEvent:]
8.13 MB 40.0% 3 -[NSWindow(NSEventRouting) _reallySendEvent:isDelayedEvent:]
8.13 MB 40.0% 3 _routeMouseMovedEvent
8.13 MB 40.0% 3 -[EmacsView mouseMoved:]
8.13 MB 40.0% 3 ns_note_mouse_movement
8.13 MB 40.0% 3 -[EmacsView lockFocus]
8.13 MB 40.0% 3 -[EmacsLayer getContext]
8.13 MB 40.0% 3 IOSurfaceCreate
8.13 MB 40.0% 2 -[IOSurface initWithProperties:]
8.13 MB 40.0% 2 IOSurfaceClientCreateChild
400 Bytes 0.0% 1 _ioSurfaceClientCreateWithLockResult
400 Bytes 0.0% 1 _malloc_type_malloc_outlined
16 Bytes 0.0% 1 _objc_rootAllocWithZone
16 Bytes 0.0% 1 _malloc_type_calloc_outlined