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rbx -Xlog.gc.set -Xlog.gc.run -Xdiagnostics.target=diagnostics.json -Xdiagnostics.interval=50 -Xdiagnostics.machine.enabled=yes -Xdiagnostics.profiler.enabled=yes -Xdiagnostics.profiler.min_sample=2 -v -e 'puts "hello world"; GC.run true'
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"timestamp": "Mon Feb 12 10:27:39 2018",
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