[atfzl]

This made be curious to check the real and virtual memory of some processes on my laptop (MacBook Air M1).

The real memory size of Safari is ~160MB but virtual memory size is 392GB which doesn't look right. I checked other processes and all the processes have similar virtual memory size which is around ~390GB.

I wonder if this is a bug in Activity Monitor or the virtual memory allocations really are this big for each process.

[kccqzy]

That sounds about right. The runtime of a certain language actually allocates 1TB of virtual memory at startup, and then hands out memory from that pool. It's just reserving 1TB of virtual address space.

[EdSchouten]

That’s likely because of the dyld shared cache.