Loading xlsx with filtering, 1K rows at a time

trying to set up...
iterator returned
Initializing
Peak:   3689352
Memory: 3654932
GCed:   3654932
GCed:   124090760
initialized for [1, 1001)
Initializing
Peak:   124123160
Memory: 124102304
GCed:   8544144
GCed:   126657828
initialized for [1001, 2001)
Initializing
Peak:   126706816
Memory: 126657872
GCed:   8544720
GCed:   129203368
initialized for [2001, 3001)
Initializing
Peak:   129278956
Memory: 129203412
GCed:   8545296
GCed:   131733028
initialized for [3001, 4001)
Initializing
Peak:   131829648
Memory: 131733072
GCed:   8545872
GCed:   134293796
initialized for [4001, 5001)
Initializing
Peak:   134411248
Memory: 134293840
GCed:   8546448
GCed:   136821932
initialized for [5001, 6001)
Initializing
Peak:   136957232
Memory: 136821976
GCed:   8547024
GCed:   139713124
initialized for [6001, 7001)
Initializing
Peak:   139856576
Memory: 139713168
GCed:   8547600
GCed:   147215936
initialized for [7001, 8001)
Initializing
Peak:   147360168
Memory: 147215980
GCed:   8548176
GCed:   149953244
initialized for [8001, 9001)
Initializing
Peak:   150099200
Memory: 149953288
GCed:   8548752
GCed:   152777076
initialized for [9001, 10001)
Initializing
Peak:   152921800
Memory: 152777120
GCed:   8549352
GCed:   155344840
initialized for [10001, 11001)