which task / program will consume lot of memory space of android device? -

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i want use memory or stress memory, @ peak capability consuming of ram space. came tasks parallelly searching text in many files, calling functions recursively fill stack space.

searching not fill memory on own. fill heap need hold many or large objects in memory.

for example: 

list<string> mlist = new arraylist<string>(); (int = 0; < 999999; i++) {   mlist.add("garbage"); }

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