This is all really nice work and I'm increasingly frustrated with being stuck with 1.1 hahahaha
(Still playing it though ;) )

Windows also has mechanisms of shared memory combined with copy-on-write, however it's very Windows specific and definitely not as easy to use as a simple fork() with a ...

When did you implement fork() for save? I suggested it in 2016! viewtopic.php?f=66&t=24242

I would like to underline the fact that fork() does not copy memory, it only copies page mapping so you can fork() really fast and get a consistent memory snapshot in the child process. You can then traverse memory in basically any order and get copy-on-write behaviour in parent process where only ...

The problem you described is actually solved using pthread_atfork and glibc actually defines a couple of handlers, one for dynamic symbols resolution and one for malloc.
Also I should note that music actually pauses when factorio is performing game save so it should not be an issue as well.

It would also help linux dedicated servers as well, and there usually is a plenty of memory available on servers. By the way, fork() is often used by server software (e.g. Redis) when a consistent snapshot of data is required.

I suppose that games are usualy having "ticks" and the state is fully sync between ticks so it is a good place to perform fork() without any issues. Also the game already has "save" so it should be already happening. Usage of fork() could provide drastically reduced wait times and the effect would ...

On *nix systems there exists a really convenient system call: fork(). I suppose that you know what it does, but in case you don't here is a brief explanation:

1) It stops the process with all threads
2) Makes a clone of a calling thread by copying the page list of a parent process and marking all ...