collectMeasurements with no argument appears to return too much (perhaps duplicated?) data

These settings are used for JMole

export JAVA_OPTS="-Djmole.config.level=5 -Djmole.config.filenames='/usr/jboss/sjipl/JMole_JVM.xml' -Djmole.protocol.munin.enabled=true -Djmole.protocol.munin.name=JMole -Djmole.protocol.munin.address=iplmq -Djmole.protocol.munin.port=4949 -Djmole.protocol.munin.tcpReadTimeOut=10000 -Djmole.protocol.munin.maxThreads=5"

The configuration file contains the two categories "JVM" and "Operating System".

First I output the measurements individually for these two categories using the one (1) argument version of collectMeasurements. The combined output of these categories is what I expect the no argument version of collectMeasurements to return.

collectMeasurements("JVM")

{Uptime={Uptime=91820}, Threads={PeakThreadCount=139, DaemonThreadCount=39, ThreadCount=138}, Time spent in Garbage Collection/min: PS Scavenge={CollectionTime=39.0}, Garbage Collections/min: PS MarkSweep={}, Time spent in last Garbage Collection: PS MarkSweep={duration=183}, Time spent in Garbage Collection/min: PS MarkSweep={CollectionTime=0.0}, Number of threads in last Garbage Collection: PS Scavenge={GcThreadCount=2}, Memory pool: PS Survivor Space={max=35061760, committed=35061760, init=22347776, used=3182104}, Class Loading={LoadedClassCount=14581, UnloadedClassCount=0, TotalLoadedClassCount=14581}, Memory pool: PS Eden Space={max=109314048, committed=107741184, init=134217728, used=78576920}, Heap Memory={max=500760576, committed=500760576, init=536870912, used=211473200}, Memory pool: PS Perm Gen={max=268435456, committed=103677952, init=21757952, used=103576080}, Memory pool: Code Cache={max=50331648, committed=5767168, init=2555904, used=5624000}, Garbage Collection: Objects pending finalization={ObjectPendingFinalizationCount=0}, Memory pool: PS Old Gen={max=357957632, committed=357957632, init=357957632, used=129714176}, Number of threads in last Garbage Collection: PS MarkSweep={GcThreadCount=2}, Non Heap Memory={max=318767104, committed=109445120, init=24313856, used=109197952}, Garbage Collections/min: PS Scavenge={}, Time spent in last Garbage Collection: PS Scavenge={duration=17}}

collectMeasurements("Operating System")

{Operating System Memory={FreePhysicalMemorySize=210878464, FreeSwapSpaceSize=1535111168, TotalPhysicalMemorySize=4145127424, TotalSwapSpaceSize=1535111168, CommittedVirtualMemorySize=2131173376}, File descriptors={OpenFileDescriptorCount=527, MaxFileDescriptorCount=1048576}, Operating System Load={SystemLoadAverage=0.65}}

However, the no-argument version of collectMeasurements returns far more data than these categories combined:

collectMeasurements()

{Operating System=[{Operating System Memory={FreePhysicalMemorySize=209956864, FreeSwapSpaceSize=1535111168, TotalPhysicalMemorySize=4145127424, TotalSwapSpaceSize=1535111168, CommittedVirtualMemorySize=2131173376}, File descriptors={OpenFileDescriptorCount=527, MaxFileDescriptorCount=1048576}, Operating System Load={SystemLoadAverage=0.06}}, {Operating System Memory={FreePhysicalMemorySize=209956864, FreeSwapSpaceSize=1535111168, TotalPhysicalMemorySize=4145127424, TotalSwapSpaceSize=1535111168, CommittedVirtualMemorySize=2131173376}, File descriptors={OpenFileDescriptorCount=527, MaxFileDescriptorCount=1048576}, Operating System Load={SystemLoadAverage=0.06}}, {Operating System Memory={FreePhysicalMemorySize=209956864, FreeSwapSpaceSize=1535111168, TotalPhysicalMemorySize=4145127424, TotalSwapSpaceSize=1535111168, CommittedVirtualMemorySize=2131173376}, File descriptors={OpenFileDescriptorCount=527, MaxFileDescriptorCount=1048576}, Operating System Load={SystemLoadAverage=0.06}}], JVM=[{Uptime={Uptime=630068}, Threads={PeakThreadCount=142, DaemonThreadCount=38, ThreadCount=141}, Time spent in Garbage Collection/min: PS Scavenge={CollectionTime=0.0}, Garbage Collections/min: PS MarkSweep={CollectionCount=0.0}, Time spent in last Garbage Collection: PS MarkSweep={duration=183}, Time spent in Garbage Collection/min: PS MarkSweep={CollectionTime=0.0}, Number of threads in last Garbage Collection: PS Scavenge={GcThreadCount=2}, Memory pool: PS Survivor Space={max=34144256, committed=34144256, init=22347776, used=688160}, Class Loading={LoadedClassCount=14601, UnloadedClassCount=0, TotalLoadedClassCount=14601}, Memory pool: PS Eden Space={max=111214592, committed=110231552, init=134217728, used=60554648}, Heap Memory={max=502333440, committed=502333440, init=536870912, used=194290568}, Memory pool: PS Perm Gen={max=268435456, committed=103874560, init=21757952, used=103757168}, Memory pool: Code Cache={max=50331648, committed=5832704, init=2555904, used=5732992}, Garbage Collection: Objects pending finalization={ObjectPendingFinalizationCount=0}, Memory pool: PS Old Gen={max=357957632, committed=357957632, init=357957632, used=133047760}, Number of threads in last Garbage Collection: PS MarkSweep={GcThreadCount=2}, Non Heap Memory={max=318767104, committed=109707264, init=24313856, used=109490160}, Garbage Collections/min: PS Scavenge={CollectionCount=0.0}, Time spent in last Garbage Collection: PS Scavenge={duration=8}}, {Uptime={Uptime=630073}, Threads={PeakThreadCount=142, DaemonThreadCount=38, ThreadCount=141}, Time spent in Garbage Collection/min: PS Scavenge={CollectionTime=0.0}, Garbage Collections/min: PS MarkSweep={CollectionCount=0.0}, Time spent in last Garbage Collection: PS MarkSweep={duration=183}, Time spent in Garbage Collection/min: PS MarkSweep={CollectionTime=0.0}, Number of threads in last Garbage Collection: PS Scavenge={GcThreadCount=2}, Memory pool: PS Survivor Space={max=34144256, committed=34144256, init=22347776, used=688160}, Class Loading={LoadedClassCount=14601, UnloadedClassCount=0, TotalLoadedClassCount=14601}, Memory pool: PS Eden Space={max=111214592, committed=110231552, init=134217728, used=60554648}, Heap Memory={max=502333440, committed=502333440, init=536870912, used=194290568}, Memory pool: PS Perm Gen={max=268435456, committed=103874560, init=21757952, used=103757416}, Memory pool: Code Cache={max=50331648, committed=5832704, init=2555904, used=5732992}, Garbage Collection: Objects pending finalization={ObjectPendingFinalizationCount=0}, Memory pool: PS Old Gen={max=357957632, committed=357957632, init=357957632, used=133047760}, Number of threads in last Garbage Collection: PS MarkSweep={GcThreadCount=2}, Non Heap Memory={max=318767104, committed=109707264, init=24313856, used=109490160}, Garbage Collections/min: PS Scavenge={CollectionCount=0.0}, Time spent in last Garbage Collection: PS Scavenge={duration=8}}, {Uptime={Uptime=630077}, Threads={PeakThreadCount=142, DaemonThreadCount=38, ThreadCount=141}, Time spent in Garbage Collection/min: PS Scavenge={CollectionTime=0.0}, Garbage Collections/min: PS MarkSweep={CollectionCount=0.0}, Time spent in last Garbage Collection: PS MarkSweep={duration=183}, Time spent in Garbage Collection/min: PS MarkSweep={CollectionTime=0.0}, Number of threads in last Garbage Collection: PS Scavenge={GcThreadCount=2}, Memory pool: PS Survivor Space={max=34144256, committed=34144256, init=22347776, used=688160}, Class Loading={LoadedClassCount=14601, UnloadedClassCount=0, TotalLoadedClassCount=14601}, Memory pool: PS Eden Space={max=111214592, committed=110231552, init=134217728, used=60554648}, Heap Memory={max=502333440, committed=502333440, init=536870912, used=194290568}, Memory pool: PS Perm Gen={max=268435456, committed=103874560, init=21757952, used=103757416}, Memory pool: Code Cache={max=50331648, committed=5832704, init=2555904, used=5732992}, Garbage Collection: Objects pending finalization={ObjectPendingFinalizationCount=0}, Memory pool: PS Old Gen={max=357957632, committed=357957632, init=357957632, used=133047760}, Number of threads in last Garbage Collection: PS MarkSweep={GcThreadCount=2}, Non Heap Memory={max=318767104, committed=109707264, init=24313856, used=109490408}, Garbage Collections/min: PS Scavenge={CollectionCount=0.0}, Time spent in last Garbage Collection: PS Scavenge={duration=8}}, {Uptime={Uptime=630081}, Threads={PeakThreadCount=142, DaemonThreadCount=38, ThreadCount=141}, Time spent in Garbage Collection/min: PS Scavenge={CollectionTime=0.0}, Garbage Collections/min: PS MarkSweep={CollectionCount=0.0}, Time spent in last Garbage Collection: PS MarkSweep={duration=183}, Time spent in Garbage Collection/min: PS MarkSweep={CollectionTime=0.0}, Number of threads in last Garbage Collection: PS Scavenge={GcThreadCount=2}, Memory pool: PS Survivor Space={max=34144256, committed=34144256, init=22347776, used=688160}, Class Loading={LoadedClassCount=14601, UnloadedClassCount=0, TotalLoadedClassCount=14601}, Memory pool: PS Eden Space={max=111214592, committed=110231552, init=134217728, used=61081128}, Heap Memory={max=502333440, committed=502333440, init=536870912, used=194817048}, Memory pool: PS Perm Gen={max=268435456, committed=103874560, init=21757952, used=103757416}, Memory pool: Code Cache={max=50331648, committed=5832704, init=2555904, used=5732992}, Garbage Collection: Objects pending finalization={ObjectPendingFinalizationCount=0}, Memory pool: PS Old Gen={max=357957632, committed=357957632, init=357957632, used=133047760}, Number of threads in last Garbage Collection: PS MarkSweep={GcThreadCount=2}, Non Heap Memory={max=318767104, committed=109707264, init=24313856, used=109490408}, Garbage Collections/min: PS Scavenge={CollectionCount=0.0}, Time spent in last Garbage Collection: PS Scavenge={duration=8}}, {Uptime={Uptime=630087}, Threads={PeakThreadCount=142, DaemonThreadCount=38, ThreadCount=141}, Time spent in Garbage Collection/min: PS Scavenge={CollectionTime=0.0}, Garbage Collections/min: PS MarkSweep={CollectionCount=0.0}, Time spent in last Garbage Collection: PS MarkSweep={duration=183}, Time spent in Garbage Collection/min: PS MarkSweep={CollectionTime=0.0}, Number of threads in last Garbage Collection: PS Scavenge={GcThreadCount=2}, Memory pool: PS Survivor Space={max=34144256, committed=34144256, init=22347776, used=688160}, Class Loading={LoadedClassCount=14608, UnloadedClassCount=0, TotalLoadedClassCount=14607}, Memory pool: PS Eden Space={max=111214592, committed=110231552, init=134217728, used=61081128}, Heap Memory={max=502333440, committed=502333440, init=536870912, used=194817048}, Memory pool: PS Perm Gen={max=268435456, committed=103874560, init=21757952, used=103764176}, Memory pool: Code Cache={max=50331648, committed=5832704, init=2555904, used=5732992}, Garbage Collection: Objects pending finalization={ObjectPendingFinalizationCount=0}, Memory pool: PS Old Gen={max=357957632, committed=357957632, init=357957632, used=133047760}, Number of threads in last Garbage Collection: PS MarkSweep={GcThreadCount=2}, Non Heap Memory={max=318767104, committed=109707264, init=24313856, used=109493872}, Garbage Collections/min: PS Scavenge={CollectionCount=0.0}, Time spent in last Garbage Collection: PS Scavenge={duration=8}}, {Uptime={Uptime=630092}, Threads={PeakThreadCount=142, DaemonThreadCount=38, ThreadCount=141}, Time spent in Garbage Collection/min: PS Scavenge={CollectionTime=0.0}, Garbage Collections/min: PS MarkSweep={CollectionCount=0.0}, Time spent in last Garbage Collection: PS MarkSweep={duration=183}, Time spent in Garbage Collection/min: PS MarkSweep={CollectionTime=0.0}, Number of threads in last Garbage Collection: PS Scavenge={GcThreadCount=2}, Memory pool: PS Survivor Space={max=34144256, committed=34144256, init=22347776, used=688160}, Class Loading={LoadedClassCount=14609, UnloadedClassCount=0, TotalLoadedClassCount=14609}, Memory pool: PS Eden Space={max=111214592, committed=110231552, init=134217728, used=61607720}, Heap Memory={max=502333440, committed=502333440, init=536870912, used=195343640}, Memory pool: PS Perm Gen={max=268435456, committed=103874560, init=21757952, used=103783952}, Memory pool: Code Cache={max=50331648, committed=5832704, init=2555904, used=5732992}, Garbage Collection: Objects pending finalization={ObjectPendingFinalizationCount=0}, Memory pool: PS Old Gen={max=357957632, committed=357957632, init=357957632, used=133047760}, Number of threads in last Garbage Collection: PS MarkSweep={GcThreadCount=2}, Non Heap Memory={max=318767104, committed=109707264, init=24313856, used=109516944}, Garbage Collections/min: PS Scavenge={CollectionCount=0.0}, Time spent in last Garbage Collection: PS Scavenge={duration=8}}, {Uptime={Uptime=630099}, Threads={PeakThreadCount=142, DaemonThreadCount=38, ThreadCount=141}, Time spent in Garbage Collection/min: PS Scavenge={CollectionTime=0.0}, Garbage Collections/min: PS MarkSweep={CollectionCount=0.0}, Time spent in last Garbage Collection: PS MarkSweep={duration=183}, Time spent in Garbage Collection/min: PS MarkSweep={CollectionTime=0.0}, Number of threads in last Garbage Collection: PS Scavenge={GcThreadCount=2}, Memory pool: PS Survivor Space={max=34144256, committed=34144256, init=22347776, used=688160}, Class Loading={LoadedClassCount=14609, UnloadedClassCount=0, TotalLoadedClassCount=14609}, Memory pool: PS Eden Space={max=111214592, committed=110231552, init=134217728, used=61607720}, Heap Memory={max=502333440, committed=502333440, init=536870912, used=195343640}, Memory pool: PS Perm Gen={max=268435456, committed=103874560, init=21757952, used=103783952}, Memory pool: Code Cache={max=50331648, committed=5832704, init=2555904, used=5732992}, Garbage Collection: Objects pending finalization={ObjectPendingFinalizationCount=0}, Memory pool: PS Old Gen={max=357957632, committed=357957632, init=357957632, used=133047760}, Number of threads in last Garbage Collection: PS MarkSweep={GcThreadCount=2}, Non Heap Memory={max=318767104, committed=109707264, init=24313856, used=109516944}, Garbage Collections/min: PS Scavenge={CollectionCount=0.0}, Time spent in last Garbage Collection: PS Scavenge={duration=8}}, {Uptime={Uptime=630103}, Threads={PeakThreadCount=142, DaemonThreadCount=38, ThreadCount=141}, Time spent in Garbage Collection/min: PS Scavenge={CollectionTime=0.0}, Garbage Collections/min: PS MarkSweep={CollectionCount=0.0}, Time spent in last Garbage Collection: PS MarkSweep={duration=183}, Time spent in Garbage Collection/min: PS MarkSweep={CollectionTime=0.0}, Number of threads in last Garbage Collection: PS Scavenge={GcThreadCount=2}, Memory pool: PS Survivor Space={max=34144256, committed=34144256, init=22347776, used=688160}, Class Loading={LoadedClassCount=14609, UnloadedClassCount=0, TotalLoadedClassCount=14609}, Memory pool: PS Eden Space={max=111214592, committed=110231552, init=134217728, used=62134288}, Heap Memory={max=502333440, committed=502333440, init=536870912, used=195870208}, Memory pool: PS Perm Gen={max=268435456, committed=103874560, init=21757952, used=103784552}, Memory pool: Code Cache={max=50331648, committed=5832704, init=2555904, used=5732992}, Garbage Collection: Objects pending finalization={ObjectPendingFinalizationCount=0}, Memory pool: PS Old Gen={max=357957632, committed=357957632, init=357957632, used=133047760}, Number of threads in last Garbage Collection: PS MarkSweep={GcThreadCount=2}, Non Heap Memory={max=318767104, committed=109707264, init=24313856, used=109517192}, Garbage Collections/min: PS Scavenge={CollectionCount=0.0}, Time spent in last Garbage Collection: PS Scavenge={duration=8}}, {Uptime={Uptime=630107}, Threads={PeakThreadCount=142, DaemonThreadCount=38, ThreadCount=141}, Time spent in Garbage Collection/min: PS Scavenge={CollectionTime=0.0}, Garbage Collections/min: PS MarkSweep={CollectionCount=0.0}, Time spent in last Garbage Collection: PS MarkSweep={duration=183}, Time spent in Garbage Collection/min: PS MarkSweep={CollectionTime=0.0}, Number of threads in last Garbage Collection: PS Scavenge={GcThreadCount=2}, Memory pool: PS Survivor Space={max=34144256, committed=34144256, init=22347776, used=688160}, Class Loading={LoadedClassCount=14609, UnloadedClassCount=0, TotalLoadedClassCount=14609}, Memory pool: PS Eden Space={max=111214592, committed=110231552, init=134217728, used=62134288}, Heap Memory={max=502333440, committed=502333440, init=536870912, used=195870208}, Memory pool: PS Perm Gen={max=268435456, committed=103874560, init=21757952, used=103784552}, Memory pool: Code Cache={max=50331648, committed=5832704, init=2555904, used=5732992}, Garbage Collection: Objects pending finalization={ObjectPendingFinalizationCount=0}, Memory pool: PS Old Gen={max=357957632, committed=357957632, init=357957632, used=133047760}, Number of threads in last Garbage Collection: PS MarkSweep={GcThreadCount=2}, Non Heap Memory={max=318767104, committed=109707264, init=24313856, used=109517544}, Garbage Collections/min: PS Scavenge={CollectionCount=0.0}, Time spent in last Garbage Collection: PS Scavenge={duration=8}}, {Uptime={Uptime=630111}, Threads={PeakThreadCount=142, DaemonThreadCount=38, ThreadCount=141}, Time spent in Garbage Collection/min: PS Scavenge={CollectionTime=0.0}, Garbage Collections/min: PS MarkSweep={CollectionCount=0.0}, Time spent in last Garbage Collection: PS MarkSweep={duration=183}, Time spent in Garbage Collection/min: PS MarkSweep={CollectionTime=0.0}, Number of threads in last Garbage Collection: PS Scavenge={GcThreadCount=2}, Memory pool: PS Survivor Space={max=34144256, committed=34144256, init=22347776, used=688160}, Class Loading={LoadedClassCount=14609, UnloadedClassCount=0, TotalLoadedClassCount=14609}, Memory pool: PS Eden Space={max=111214592, committed=110231552, init=134217728, used=62660728}, Heap Memory={max=502333440, committed=502333440, init=536870912, used=196396648}, Memory pool: PS Perm Gen={max=268435456, committed=103874560, init=21757952, used=103784768}, Memory pool: Code Cache={max=50331648, committed=5832704, init=2555904, used=5732992}, Garbage Collection: Objects pending finalization={ObjectPendingFinalizationCount=0}, Memory pool: PS Old Gen={max=357957632, committed=357957632, init=357957632, used=133047760}, Number of threads in last Garbage Collection: PS MarkSweep={GcThreadCount=2}, Non Heap Memory={max=318767104, committed=109707264, init=24313856, used=109517760}, Garbage Collections/min: PS Scavenge={CollectionCount=0.0}, Time spent in last Garbage Collection: PS Scavenge={duration=8}}, {Uptime={Uptime=630127}, Threads={PeakThreadCount=142, DaemonThreadCount=38, ThreadCount=141}, Time spent in Garbage Collection/min: PS Scavenge={CollectionTime=0.0}, Garbage Collections/min: PS MarkSweep={CollectionCount=0.0}, Time spent in last Garbage Collection: PS MarkSweep={duration=183}, Time spent in Garbage Collection/min: PS MarkSweep={CollectionTime=0.0}, Number of threads in last Garbage Collection: PS Scavenge={GcThreadCount=2}, Memory pool: PS Survivor Space={max=34144256, committed=34144256, init=22347776, used=688160}, Class Loading={LoadedClassCount=14609, UnloadedClassCount=0, TotalLoadedClassCount=14609}, Memory pool: PS Eden Space={max=111214592, committed=110231552, init=134217728, used=62660728}, Heap Memory={max=502333440, committed=502333440, init=536870912, used=196396648}, Memory pool: PS Perm Gen={max=268435456, committed=103874560, init=21757952, used=103784832}, Memory pool: Code Cache={max=50331648, committed=5832704, init=2555904, used=5738880}, Garbage Collection: Objects pending finalization={ObjectPendingFinalizationCount=0}, Memory pool: PS Old Gen={max=357957632, committed=357957632, init=357957632, used=133047760}, Number of threads in last Garbage Collection: PS MarkSweep={GcThreadCount=2}, Non Heap Memory={max=318767104, committed=109707264, init=24313856, used=109523712}, Garbage Collections/min: PS Scavenge={CollectionCount=0.0}, Time spent in last Garbage Collection: PS Scavenge={duration=8}}, {Uptime={Uptime=630131}, Threads={PeakThreadCount=142, DaemonThreadCount=38, ThreadCount=141}, Time spent in Garbage Collection/min: PS Scavenge={CollectionTime=0.0}, Garbage Collections/min: PS MarkSweep={CollectionCount=0.0}, Time spent in last Garbage Collection: PS MarkSweep={duration=183}, Time spent in Garbage Collection/min: PS MarkSweep={CollectionTime=0.0}, Number of threads in last Garbage Collection: PS Scavenge={GcThreadCount=2}, Memory pool: PS Survivor Space={max=34144256, committed=34144256, init=22347776, used=688160}, Class Loading={LoadedClassCount=14609, UnloadedClassCount=0, TotalLoadedClassCount=14609}, Memory pool: PS Eden Space={max=111214592, committed=110231552, init=134217728, used=62660728}, Heap Memory={max=502333440, committed=502333440, init=536870912, used=196396648}, Memory pool: PS Perm Gen={max=268435456, committed=103874560, init=21757952, used=103784832}, Memory pool: Code Cache={max=50331648, committed=5832704, init=2555904, used=5738880}, Garbage Collection: Objects pending finalization={ObjectPendingFinalizationCount=0}, Memory pool: PS Old Gen={max=357957632, committed=357957632, init=357957632, used=133047760}, Number of threads in last Garbage Collection: PS MarkSweep={GcThreadCount=2}, Non Heap Memory={max=318767104, committed=109707264, init=24313856, used=109523712}, Garbage Collections/min: PS Scavenge={CollectionCount=0.0}, Time spent in last Garbage Collection: PS Scavenge={duration=8}}, {Uptime={Uptime=630135}, Threads={PeakThreadCount=142, DaemonThreadCount=38, ThreadCount=141}, Time spent in Garbage Collection/min: PS Scavenge={CollectionTime=0.0}, Garbage Collections/min: PS MarkSweep={CollectionCount=0.0}, Time spent in last Garbage Collection: PS MarkSweep={duration=183}, Time spent in Garbage Collection/min: PS MarkSweep={CollectionTime=0.0}, Number of threads in last Garbage Collection: PS Scavenge={GcThreadCount=2}, Memory pool: PS Survivor Space={max=34144256, committed=34144256, init=22347776, used=688160}, Class Loading={LoadedClassCount=14609, UnloadedClassCount=0, TotalLoadedClassCount=14609}, Memory pool: PS Eden Space={max=111214592, committed=110231552, init=134217728, used=63187288}, Heap Memory={max=502333440, committed=502333440, init=536870912, used=196923208}, Memory pool: PS Perm Gen={max=268435456, committed=103874560, init=21757952, used=103785872}, Memory pool: Code Cache={max=50331648, committed=5832704, init=2555904, used=5738880}, Garbage Collection: Objects pending finalization={ObjectPendingFinalizationCount=0}, Memory pool: PS Old Gen={max=357957632, committed=357957632, init=357957632, used=133047760}, Number of threads in last Garbage Collection: PS MarkSweep={GcThreadCount=2}, Non Heap Memory={max=318767104, committed=109707264, init=24313856, used=109524752}, Garbage Collections/min: PS Scavenge={CollectionCount=0.0}, Time spent in last Garbage Collection: PS Scavenge={duration=8}}]}

Why does collectMeasurements contain so much more data in comparison to listing the individual categories by themselves? To my eye this output seems to contain a lot of duplicated data.

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