MultiSource/Benchmarks/MallocBench/gs/traceop.ps

% Trace vmem usage after individual operators
/.traceop
 { vmstatus exch =only ( ) print = pop flush
   systemdict exch get exec
 } bind def
/traceop
 { dup [ exch /.traceop cvx ] cvx def
 } bind def

/setcachedevice traceop