The system_profiler command used to determine the total memory on darwin
systems performs an "Activation Lock" check. This can produce a delay in
returning total memory. I began experiencing delays of around 10 seconds.
Switching from system_profiler to sysctl to calculate total memory
bypasses the "Activation Lock" check / timeout scenario.
Results of "time" command using system_profiler:
system_profiler SPHardwareDataType 0.17s user 0.23s system 3% cpu 10.165 total
grep -a "Memory:" 0.00s user 0.00s system 0% cpu 10.164 total
awk '{print $2 $3}' 0.00s user 0.00s system 0% cpu 10.163 total
Results of "time" command using sysctl:
sysctl -n hw.memsize 0.00s user 0.00s system 83% cpu 0.004 total
awk '{print $0/1024/1024/1024 " GB"}' 0.00s user 0.00s system 86% cpu 0.004 total
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