Why are 3 export plugins constantly polling?

[rcorre]

While looking into godotengine/godot#35868, I noticed that the Javascript, IOS, and Android exporters are in a constant poll loop as soon as I start the editor. They're not consuming an excessive amount of CPU, but it still seemed a bit odd. Is there any way to disable these short of re-compiling godot without support for the platforms? Could they maybe only be registered if you have an export target for that platform? What does this poll loop do?

https://github.com/godotengine/godot/blob/242c05d12f134d8f079debaf50161ef83d1a3b8c/platform/iphone/export/export.cpp#L144-L178

Thread 9 (Thread 0x7fffb77fe640 (LWP 83945) "godot.x11.opt.t"):
#0  0x00007ffff7b64a55 in clock_nanosleep@GLIBC_2.2.5 () from /usr/lib/libc.so.6
#1  0x00007ffff7b69717 in nanosleep () from /usr/lib/libc.so.6
#2  0x00000000013f7270 in OS_Unix::delay_usec (this=<optimized out>, p_usec=<optimized out>) at drivers/unix/os_unix.cpp:243
#3  0x0000000001d5f9ed in EditorExportPlatformJavaScript::_server_thread_poll (data=0x9a1a430) at platform/javascript/export/export.cpp:966
#4  0x0000000003179a05 in Thread::callback (p_self=<optimized out>, p_settings=..., p_callback=0x1d5f9c0 <EditorExportPlatformJavaScript::_server_thread_poll(void*)>, p_userdata=0x9a1a430) at core/os/thread.cpp:77
#5  0x00000000034d3ed4 in execute_native_thread_routine ()
#6  0x00007ffff7b195c2 in start_thread () from /usr/lib/libc.so.6
#7  0x00007ffff7b9e584 in clone () from /usr/lib/libc.so.6

Thread 8 (Thread 0x7fffb7fff640 (LWP 83944) "godot.x11.opt.t"):
#0  0x00007ffff7b64a55 in clock_nanosleep@GLIBC_2.2.5 () from /usr/lib/libc.so.6
#1  0x00007ffff7b69717 in nanosleep () from /usr/lib/libc.so.6
#2  0x00000000013f7270 in OS_Unix::delay_usec (this=<optimized out>, p_usec=<optimized out>) at drivers/unix/os_unix.cpp:243
#3  0x0000000001d58c86 in EditorExportPlatformIOS::_check_for_changes_poll_thread (ud=0xa427e00) at platform/iphone/export/export.cpp:171
#4  0x0000000003179a05 in Thread::callback (p_self=<optimized out>, p_settings=..., p_callback=0x1d58b70 <EditorExportPlatformIOS::_check_for_changes_poll_thread(void*)>, p_userdata=0xa427e00) at core/os/thread.cpp:77
#5  0x00000000034d3ed4 in execute_native_thread_routine ()
#6  0x00007ffff7b195c2 in start_thread () from /usr/lib/libc.so.6
#7  0x00007ffff7b9e584 in clone () from /usr/lib/libc.so.6

Thread 7 (Thread 0x7fffbcb38640 (LWP 83943) "godot.x11.opt.t"):
#0  0x00007ffff7b64a55 in clock_nanosleep@GLIBC_2.2.5 () from /usr/lib/libc.so.6
#1  0x00007ffff7b69717 in nanosleep () from /usr/lib/libc.so.6
#2  0x00000000013f7270 in OS_Unix::delay_usec (this=<optimized out>, p_usec=<optimized out>) at drivers/unix/os_unix.cpp:243
#3  0x0000000001d0af43 in EditorExportPlatformAndroid::_check_for_changes_poll_thread (ud=0x9f59d30) at platform/android/export/export_plugin.cpp:380
#4  0x0000000003179a05 in Thread::callback (p_self=<optimized out>, p_settings=..., p_callback=0x1d0adc0 <EditorExportPlatformAndroid::_check_for_changes_poll_thread(void*)>, p_userdata=0x9f59d30) at core/os/thread.cpp:77
#5  0x00000000034d3ed4 in execute_native_thread_routine ()
#6  0x00007ffff7b195c2 in start_thread () from /usr/lib/libc.so.6
#7  0x00007ffff7b9e584 in clone () from /usr/lib/libc.so.6

[Zireael07]

Bug rather than proposal methinks?

[rcorre]

I'm happy to open a bug if it is considered as such. I wasn't really sure what this was, so I went for a "discussion", which is only an option in the proposals repo.

[Mickeon]

I feel like anyone more tech-savvy could answer right away if this were to be reported as a bug.

[Calinou]

I would consider this a bug too, so please open an issue for this.

[duane-r]

I thought that was necessary to enable/disable the android, ios, and web test buttons. I guess it would make more sense if they checked for an export profile, but if they aren't doing any harm, why bother?