Failed nightly build: http://pullrequest.opencv.org/buildbot/builders/master-win32-vc14/builds/100005

Measurements on Linux (via /usr/bin/time) for test Test_Darknet.read_yolo_voc_stream:

/usr/bin/time ./bin/opencv_test_dnn --test_threads=4 --gtest_filter=Test_Darknet.read_yolo_voc_stream

maxresident(k) value from time utility:

3.4: 769668
4.x: 2336348 (~3x)